Solved K 3.0 successfully installed on J! 2.5.11, but all pages to access component blank

Please assist. I can't find any error logs to indetify problem. After installation I see message about successful install.

Difficult to know where to begin here. Let's start by saying "G'day, Janet, and welcome to the community"

(1) No configuration report (which would be really helpful in the circumstances) - see the category header information a couple of centimetres below the part where you login/logout on this page.

(2) Looks like we're trying to see something on a local PC-hosted environment (see Support for PC-hosted websites (e.g. WAMP, XAMPP) )

(3) Did you follow the instructions given in K 3.0 Installation Guide ?

Those things for starters.

Thanks for the fast reply.
Below my answers.
1. I can't get configuration report, because all Kunena items open blank page for me.
May be there is another way to get it?

2. It is doesn't matter if I use Denwer or real hosting. I have 2 hosting in web and on both I experienced the same problem on this template with Kunena 3.0. Kunena 2.04 also can't be installed with error that it is unable to downgrade Kunena 3.0 (that was not previously installed. I restored site from backup several times)

3. I followed the instructions. More over I have tried to install from temp folder (unpacked Kunena) in Extension manager. This didn't help.
+
I have restored site from backup taken 1 month ago where Community builder has not yet been installed, but Kunena installed with blank pages anyway.

May be there is compatibility problem with some component?
Looking back to receiving your advice.

Make a list of third party components/plugins that your are using ?

Components:
1. Flexi contact
2. Community Builder
3. JCK Editor
4. JComments 2.3
5. Akeebabackup
6. sigplus
7. Uddeim

Plugin:
1. Recaptcha for Community builder

Uninstallled from Joomla:
1. Virtuemart
2. Cherry Picker

That is not your configuration report. I suggest you read K 3.0 Configuration Report in the Wiki.