I am trying to setup gitolite on my server (Macos server).
I followed the instructions in the INSTALL document found here : http://sitaramc.github.com/gitolite/doc/1
don't know exactly which is the problem with your installation, it would be useful to know which commands you 've executed to install gitolite in your your server.
I recommend you to read these two links, they were helpful for me when I installed gitolite:
http://kris.me.uk/2010/09/30/git-repository-server-gitolite.html (specially this one)
http://progit.org/book/ch4-8.html