Can anyone tell do I need to fix this or is it server side?

Webmaster Tools
Fix mobile usability issues found on http://www.ourbulgariaforum.com/
To: webmaster of http://www.ourbulgariaforum.com/
Google systems have tested 237 pages from your site and found that 100% of them have critical mobile usability errors. The errors on these 237 pages severely affect how mobile users are able to experience your website. These pages will not be seen as mobile-friendly by Google Search, and will therefore be displayed and ranked appropriately for smartphone users.

Usability error	Pages with errors
Small font size	111
Touch elements too close	111
Viewport not configured	111
Content not sized to viewport	110
Flash usage	2

Hmm wierd... your site works just fine for me (I am on a tablet), it could maybe be that the mobile version of FM is pretty darn basic (I am really basic) which may be what google refers too. The mobile version does not use avatars, can not see your ad banners at the top (my tablet can view the classic or desktop version) and all that kind of stuff. I am not entirelly sure why google said this... I am just taking a very wild guess.
-Brandon