I think you’ve got some more work to do with your onpage optimization. For example you should have appropriate title tags on each page containing keywords that are also present in the text. Often your titles aren’t descriptive at all of what the pages contain.
Also your forum is not search engine friendly at all with session id:s but maybe making the forum search engine friendly can wait a little.
The keyword meta tags should always contain keywords that are present on the current page. If they contain words that are not present on the page it is a negative factor for search engines.