Giving Windows Mobile 5 on an iPAQ access to files on a Win 2003 Server

I’m trying to give file access on a Win 2003 Server to an iPAQ running Win Mobile 5. I can get as far as requesting the path, a username, password, domain window comes up. When a domain user is entered, the logon fails. The event log on the server shows the logon attemp. I’m stumped as to why the logon fails. I’m new to Win 2003 Server having recently upgraded fron NT 4.0.

Any help would be appreciated.

Bruno