Leopard client hangs trying to login to Tiger Server

Hi,

I helped upgrade a few client machines to leopard over the weekend and one of the users is frequently having issues logging into her iMac. She will enter her OD username and password and the login type (username, password) goes grey, like a successful login, then stays there. After several minutes, it will pop up an error saying she can’t login at this time. Restarting or trying again later will work without issue.

The user can login to any other machine on our network without problem. I’ve tried removing her connection to the Tiger Server via Directory Utility and re-establishing that, but I’m not sure if that is all I can do to hope to resolve the issue. While my skills with Leopard client are fairly sound, I don’t have much experience working in the Server environment.

Any advice you can offer would be appreciated.