Redmine

Hi all,
I am trying to run redmine on my virtual host. I configured it and followed steps in wiki and redmine is running. I tried it using webrick (as mentioned in wiki) everything worked excelent. Then I configured apache2 to be able web acces to redmine installation using passenger and there is a problem. Redmine, apache2 even mysql started with no error. But if I want to access to my installation of redmine, I get extreme lag. Sometimes I get 500 (internal error), but I can't see anything in redmine log (log/production.log). Sometimes I get mysql error (connection closed), sometimes I get passenger error (connection expired).
I thought there is a problem with RAM, I updated but this problem still occurs.
I found in FAQ there was a bug in mysq-ruby package, but I am running 2.8.2-r1 on my Gentoo server.

Can anyone give me a hand?
Thanks a lot.