Question 500 - No valid database connection

When i wont to remove topic or post this error shows up:

500 - No valid database connection

any idea why?

I think there is more to the message that you have not revealed. Could you please post the whole message accompanying the "No valid database connection" error?

Could you also please provide you K 1.6 configuration report. Thank you.

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

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

This message contains confidential information

htaccess: Exists | PHP environment: Max execution time: 30 seconds | Max execution memory: 128M | Max file upload: 64M

Joomla default template details : 123wd-j15-10 | author: 123WebDesign.com | version: 1.0.0 | creationdate: 05/2009

Kunena version detailled: Installed version: 1.6.1 | Build: 3858 | Version name: Timu | Kunena detailled configuration:

Warning: Spoiler!

[th]Kunena config settings:[/th]

board_title	Forum ENAS
board_offline	0
board_ofset	0
offline_message	<h2>The Forum is currently offline for maintenance.</h2> <div>Check back soon!</div>
enablerss	1
enablepdf	0
threads_per_page	20
messages_per_page	15
messages_per_page_search	15
showhistory	1
historylimit	6
shownew	1
jmambot	0
disemoticons	0
template	default
showannouncement	1
avataroncat	1
catimagepath	category_images/
showchildcaticon	0
annmodid	62
rtewidth	450
rteheight	300
enableforumjump	1
reportmsg	1
username	1
askemail	0
showemail	0
showuserstats	1
showkarma	0
useredit	1
useredittime	0
useredittimegrace	600
editmarkup	1
allowsubscriptions	1
subscriptionschecked	0
allowfavorites	1
maxsubject	50
maxsig	300
regonly	0
changename	0
pubwrite	0
floodprotection	20
mailmod	0
mailadmin	0
captcha	0
mailfull	1
allowavatar	1
allowavatarupload	1
allowavatargallery	1
avatarquality	65
avatarsize	2048
allowimageupload	0
allowimageregupload	0
imageheight	800
imagewidth	800
imagesize	150
allowfileupload	0
allowfileregupload	0
filetypes	zip,txt,doc,gz,tgz
filesize	120
showranking	1
rankimages	1
avatar_src
fb_profile
pm_component
userlist_rows	30
userlist_online	1
userlist_avatar	1
userlist_name	0
userlist_username	1
userlist_posts	1
userlist_karma	0
userlist_email	0
userlist_usertype	0
userlist_joindate	1
userlist_lastvisitdate	1
userlist_userhits	1
latestcategory	0
showstats	1
showwhoisonline	1
showgenstats	1
showpopuserstats	1
popusercount	5
showpopsubjectstats	1
popsubjectcount	5
usernamechange	0
rules_infb	1
rules_cid	66
help_infb	1
help_cid	1
showspoilertag	1
showvideotag	0
showebaytag	0
trimlongurls	1
trimlongurlsfront	40
trimlongurlsback	20
autoembedyoutube	1
autoembedebay	0
ebaylanguagecode	en-us
fbsessiontimeout	1800
highlightcode	0
rss_type	post
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
fbdefaultpage	categories
default_sort	asc
alphauserpointsnumchars	40
sef	1
sefcats	0
sefutf8	0
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
js_actstr_integration	0
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
integration_access	communitybuilder
integration_login	none
integration_avatar	communitybuilder
integration_profile	communitybuilder
integration_private	uddeim
integration_activity	alphauserpoints
boxghostmessage	0
userdeletetmessage	0
latestcategory_in	1
topicicons	1
onlineusers	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
activity_limit	40

Third-party components: AlphaUserPoints: Installed (Version : 1.5.12) | CommunityBuilder: Installed (Version : 1.2.3) | Jomsocial: Disabled or not installed | UddeIm: Installed (Version : 2.0)

Plugins: System - Mootools12: Disabled | System - Mootools Upgrade: Disabled | JFirePHP: Disabled or not installed | Kunena Discuss: Disabled or not installed | Kunena Search: Disabled or not installed | My Kunena Forum Menu: Disabled or not installed | My Kunena Forum Posts: Disabled or not installed

Modules: Kunena Latest: Enabled (Version : 1.6.0-RC2) | Kunena Stats: Disabled or not installed | Kunena Login: Disabled or not installed

Screen with error its in Attachments.

I don't have any particular explanation as to why this issue occurs on your website. One possible explanation is that there is some database timeout. Does this problem occur consistently - all the time - or only occasionally?

If the problem does not occur all the time then I would refer your question to your webhosting provider. Perhaps they might have a suggestion that will help. If you do not get a satisfactory response from your webhosting provider, you might consider looking at another provider to deliver you a more reliable service.

Here are some results from Google that might assist you.

Problem shows up after last update.

and one important thing posts are getting deleted but with error