Question URL Rewriting Setting turns off my Kunena forum in the front end

Hello,

I've installed Kunena 3.0.4 in a Joomla 3.2.1 test site, as detailed in config report, below.
I've carefully followed the SEO optimisation instructions from here
My problem seems to be that when I set "Use URL rewriting" to "Yes" and click the the forum menu item in the front end, I get this messaage:

Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.

... when I set "Use URL rewriting" to "No" the front end returns to the forum as normal. Should I contact the server administrator, as suggested?

Many thanks for any assistance.

Database collation check: The collation of your table fields are correct

Joomla! SEF: Enabled | Joomla! SEF rewrite: Disabled | FTP layer: Disabled |

This message contains confidential information

htaccess: Exists | PHP environment: Max execution time: 50000 seconds | Max execution memory: 90M | Max file upload: 40M

Kunena menu details:

Warning: Spoiler!

ID	Name	Menutype	Link	Path
115	Forum	kunenamenu	view=home&defaultmenu=117	forum
116	Index	kunenamenu	view=category&layout=list	forum/index
117	Recent Topics	kunenamenu	view=topics&mode=replies	forum/recent
118	New Topic	kunenamenu	view=topic&layout=create	forum/newtopic
119	No Replies	kunenamenu	view=topics&mode=noreplies	forum/noreplies
120	My Topics	kunenamenu	view=topics&layout=user&mode=default	forum/mylatest
121	Profile	kunenamenu	view=user	forum/profile
122	Help	kunenamenu	view=misc	forum/help
123	Search	kunenamenu	view=search	forum/search
124	Forum	mainmenu	Itemid=115	kunena-2014-01-09

Joomla default template details : protostar | author: Kyle Ledbetter | version: 1.0 | creationdate: Unknown

Kunena default template details : Blue Eagle | author: Kunena Team | version: 3.0.4 | creationdate: 2013-12-22

Kunena version detailed: Kunena 3.0.4 | 2013-12-22 [ Ukko ]
| Kunena detailed configuration:

Warning: Spoiler!

Kunena config settings:
board_offline	0
enablerss	1
threads_per_page	20
messages_per_page	6
messages_per_page_search	15
showhistory	1
historylimit	6
shownew	1
disemoticons	0
template	blue_eagle
showannouncement	1
avataroncat	0
catimagepath	category_images
showchildcaticon	1
rtewidth	450
rteheight	300
enableforumjump	1
reportmsg	1
username	1
askemail	0
showemail	0
showuserstats	1
showkarma	1
useredit	1
useredittime	0
useredittimegrace	600
editmarkup	1
allowsubscriptions	1
subscriptionschecked	1
allowfavorites	1
maxsubject	50
maxsig	300
regonly	0
pubwrite	0
floodprotection	0
mailmod	0
mailadmin	0
captcha	0
mailfull	1
allowavatarupload	1
allowavatargallery	1
avatarquality	75
avatarsize	2048
imageheight	800
imagewidth	800
imagesize	150
filetypes	txt,rtf,pdf,zip,tar.gz,tgz,tar.bz2
filesize	120
showranking	1
rankimages	1
userlist_rows	30
userlist_online	1
userlist_avatar	1
userlist_name	1
userlist_posts	1
userlist_karma	1
userlist_email	0
userlist_joindate	1
userlist_lastvisitdate	1
userlist_userhits	1
latestcategory
showstats	1
showwhoisonline	1
showgenstats	1
showpopuserstats	1
popusercount	5
showpopsubjectstats	1
popsubjectcount	5
usernamechange	0
showspoilertag	1
showvideotag	1
showebaytag	1
trimlongurls	1
trimlongurlsfront	40
trimlongurlsback	20
autoembedyoutube	1
autoembedebay	1
ebaylanguagecode	en-us
sessiontimeout	1800
highlightcode	0
rss_type	topic
rss_timelimit	month
rss_limit	100
rss_included_categories
rss_excluded_categories
rss_specification	rss2.0
rss_allow_html	1
rss_author_format	name
rss_author_in_title	1
rss_word_count	0
rss_old_titles	1
rss_cache	900
defaultpage	recent
default_sort	asc
sef	1
showimgforguest	1
showfileforguest	1
pollnboptions	4
pollallowvoteone	1
pollenabled	1
poppollscount	5
showpoppollstats	1
polltimebtvotes	00:15:00
pollnbvotesbyuser	100
pollresultsuserslist	1
maxpersotext	50
ordering_system	mesid
post_dateformat	ago
post_dateformat_hover	datetime
hide_ip	1
imagetypes	jpg,jpeg,gif,png
checkmimetypes	1
imagemimetypes	image/jpeg,image/jpg,image/gif,image/png
imagequality	50
thumbheight	32
thumbwidth	32
hideuserprofileinfo	put_empty
boxghostmessage	0
userdeletetmessage	0
latestcategory_in	1
topicicons	1
debug	0
catsautosubscribed	0
showbannedreason	0
version_check	1
showthankyou	1
showpopthankyoustats	1
popthankscount	5
mod_see_deleted	0
bbcode_img_secure	text
listcat_show_moderators	1
lightbox	1
show_list_time	720
show_session_type	0
show_session_starttime	0
userlist_allowed	0
userlist_count_users	1
enable_threaded_layouts	0
category_subscriptions	post
topic_subscriptions	every
pubprofile	1
thankyou_max	10
email_recipient_count	0
email_recipient_privacy	bcc
captcha_post_limit	0
keywords	1
userkeywords	0
image_upload	registered
file_upload	registered
topic_layout	flat
time_to_create_page	1
show_imgfiles_manage_profile	1
hold_newusers_posts	0
hold_guest_posts	0
attachment_limit	8
pickup_category	0
article_display	intro
send_emails	1
fallback_english	1
cache	1
cache_time	60
iptracking	1
rss_feedburner_url
autolink	1
access_component	1
statslink_allowed	1

| Kunena integration settings:

Warning: Spoiler!

Kunena - AlphaUserPoints Disabled
Kunena - Community Builder Disabled
Kunena - Gravatar Disabled
Kunena - JomSocial Disabled
Kunena - Joomla Enabled: access=1 login=1
Kunena - Kunena Enabled: avatar=1 profile=1
Kunena - UddeIM Disabled

| Joomla! detailed language files installed:

Warning: Spoiler!

Joomla! languages installed:
en-GB	English (United Kingdom)

Third-party components: None

Third-party SEF components: None

Plugins: None

Modules: None

Have you tried to rename the J! 3.2.1 htaccess.txt to .htaccess and use that file?

Hi Sozzled,

Thanks for your reply.

I have renamed the file, yes. However, I don't understand what you mean by 'use it'. The instructions say rename it, so that's all I've done.

As long as you followed the instructions in Search Engine Optimisation (SEO) then K 3.0.4 should work with no problems (at least, this is how I have set up hundreds of websites in the past and I have never had this kind of problem).

I cannot see anything else from your Kunena configuration report that indicates why you cannot use Joomla's User URL rewriting option with your website unless, perhaps, you are using a third-party SEO "optimiser" product that we're unaware of.

One possible suggestion you might consider is the When all else fails, try this approach to prove that the problems you're having are not caused by your webhosting platform. From the looks of your site, it looks to me that you have a "vanilla-flavoured" Joomla website to begin with.

99% of these kinds of problems are not caused by Kunena but they're caused by the way that people setup Joomla. The Joomla forum has hundreds of topics about how to use Joomla's SEO features. While this may not necessarily be a Kunena problem, the more we know about how you setup Joomla, the better that someone in the community may be able to help you. Pictures of your global settings may provide us with a clue or two.

As long as you followed the instructions

... to the letter.

perhaps, you are using a third-party SEO "optimiser" product

... no, I'm not.

it looks to me that you have a "vanilla-flavoured" Joomla website

... Yes. It's a test site and I've done nothing but install Joomla and Kunena.

I've also installed joomla using my host's 'click & build' feature, and by uploading the latest version of the zip file. I've done the same with Kunena, i.e. I've used the web-install feature within Joomla and used the 'upload package file' installer. All combinations produce a problem. either the one described above or Kunena simply doesn't show up at all in the front end (even though the 'forum' menu item in Joomla is published).

Thank you for your help, Sozzled.

I hope these attachments work... (PDFs?)

Could it be anything to do with permissions?