User prompted to authenticate to SecureLogin from Windows 7 workstation, but not from XP

User is prompted to authenticate when SecureLogin is launched
User is asked to login to SecureLogin
SecureLogin does not launch seamlessly unless primary attachment is to a server running Secret Store

If the workstation client has a primary attachment to a server running SecretStore,
everything works correctly, SecureLogin launches seamlessly as expected.  If the same workstation
has a primary connection to server NOT running SecretStore, then the expected stored login credentials are not found, and the user is prompted for a password. 

Problem only occurs on Windows 7 workstations.
Problem does not occur on Win XP workstations.

Packet trace of the failure shows the SecretStore client ping all servers running SecretStore, as expected.  
All Secret Store servers respond, but the client never attempts an attachment to a server.