When i try connect to Sql server (on another macchine) with my IBM data warehouse v. 8.1(when creating a sources), then program return this error

DWC07356E An agent's processing of a command of type
"connectToSource" failed for edition "0" of step "?".
[Microsoft][ODBC SQL Server Driver][SQL Server]Impossibile
eseguire l'accesso per l'utente 'NT AUTHORITY\ACCESSO ANONIMO'.
RC = 7356 RC2 = 8515

Bat if i try this process on another macchine the version of db2 is 7 the process is ok!

I have aplayed every fix pack for db2 on db2 8.1 bat i not resolve the problem.

It's a big bag of db2 8.1 ?