Windows 7 and Domain Logon

Hello,
I am currently using version 5.8.3.0 in an XP (32 bit) environment. I connect to remote XP (32 bit) and Win7 (64 bit) workstations with domain logins, using the Remote Desktop Manager's Logon Settings. The XP connection works perfectly logging me into the workstation. The Windows 7 connection however, does not pass the domain information and attempts to logon to the workstation instead of the domain.

Here are my current settings (values changed for security purposes):


For now, I've enabled the Always ask fro credential button, but I would prefer that the logon run without manually entering the password. Is there something that I have configured incorrectly?

Thanks!