Hi Mehdi!
I assume you are installing TSM 4.1 over an existing ADSM installation on a
Windows NT box?
The return code 1315 means: The name provided is not a properly formed
account name.   ERROR_INVALID_ACCOUNT_NAME
Not very clear is it?
Could it be that the NT account you are using is not allowed to update
c:\adsm\baclient? Check the NT permissions on that folder.
Kindest regards,
Eric van Loon
KLM Royal Dutch Airlines