is it the same problem as described in the thread above by Richard Hurley and me?
It might be. I installed it following all of the instructions, and made sure my php settings were right, but I cannot login at all. When I do login, it sends me back to the home page. I think I have missed a setting, but not sure. When i try to login as admin with the password admin, it says 'Invalid User.' Since my test set up is just on a standalone network, (not connected to the net) I don't have a firewall.