We are running the following versions:
ISC 6.0.1.1
ISC 6.0.1
TSM Admin Center 5.5.0.0
ISC and TSM Admin Center are running on a Windows 2000 SP4 server.

TSM 5.5.0.0 on AIX 5.3
TSM 5.3.3.0 ON AIX 5.3

When I try to add a TSM connection from the ISC to the TSM 5.5.0.0 server,
it states that a server connection can not be established.
I have confirmed the following:
The TSM 5.3.3.0 server has been successfully added to the ISC.
The ISC can ping the TSM 5.5.0.0 and vice versa.
The admin username for the TSM 5.5.0.0 is valid and can be used to login
to the dsmadmc of the server.
Any ideas?
Thanks
JR