After installing the forum, I went to the forum and got this:

Warning: require_once(/home/klinkenb/public_html/connexus/modules/boonex/forum/layout/festb/params.php) [function.require-once]: failed to open stream: No such file or directory in /home/klinkenb/public_html/connexus/modules/boonex/forum/integrations/base/config.php on line 99

Fatal error: require_once() [function.require]: Failed opening required '/home/klinkenb/public_html/connexus/modules/boonex/forum/layout/festb/params.php' (include_path='.:/usr/local/php52/pear') in /home/klinkenb/public_html/connexus/modules/boonex/forum/integrations/base/config.php on line 99

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I clicked on the links and I got this:

Not Found

The requested URL /connexus/modules/boonex/forum/function.require was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

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Is there something that I can do to fix this?

See through ftp is it really missing? if yes than simply upload a new copy. That should work...:)

Edit: LOL nathan removed his post. Try to switch to uni and see if problem is there.

It looks like you're missing the forum part of the template.  If your template includes a forum layout, make sure it's uploaded.  If not:

Make a copy of /modules/boonex/forum/layout/uni/ and call it festb.  Then edit ./festb/params.php and change all instances of uni to festb.  Recompile languages. 

 That worked. Thx!!

Now I just need to figure out how to add my own buttons . (see attachment)

you need to recompile forum lang from manage forum section.

Ah, very good. thank you.

guys i have a similar problem at hand.

i dont have the modul forum mine is called boards when i manual try to open the board i get this error

Warning: require_once(BX_DIRECTORY_PATH_MODULES/home.php) [function.require-once]: failed to open stream: No such file or directory in /homepages/17/d42865286/htdocs/Dolphin/cms/modules/boonex/board/index.php on line 20

Fatal error: require_once() [function.require]: Failed opening required 'BX_DIRECTORY_PATH_MODULES/home.php' (include_path='.:/usr/lib/php5') in /homepages/17/d42865286/htdocs/Dolphin/cms/modules/boonex/board/index.php on line 20

when i try to open the forum from my main page i get this