We just got a Windows 7 Pro machine (64 bit) and I am able to connect to some of the servers in the network but there are 2 servers (iSeries servers. that I am unable to connect to. What could be the problem.

Hi, I'd like to inform you that Windows 7 and Windows Server 2008 R2-based computers cannot be joined to a Windows NT 4.0 SP6A domain. There are no workarounds for this behavior. You can check the following KB article: Error message when you try to join a Windows Vista, Windows Server 2008, Windows 7, or Windows Server 2008 R2-based computer to a Windows NT 4.0 domain: "Logon failure: unknown user name or bad password" http://support.microsoft.com/kb/940268 Hope this helps!Sean Zhu - MSFT