Error with ZCM 10.3.3 Agent

Hi,

I got this error with 10.3.3 ZCM agent.

Client is XP SP3.
Server is w2K3 64Bits

Full Message:
An error ocurred during a general refresh in module: Registration Module. Error Message: Could not load file or assembly 'Novell.Casa.Client.Auth, Version=1.7.0.0, Culture=neutral, PublicKeyToken=ed0eb71059ea593b' or one of its dependencies. The system cannot find the file specified.


nexpected exception received when refreshing handler Registration Module(GeneralRefresh): Could not load file or assembly 'Novell.Casa.Client.Auth, Version=1.7.0.0, Culture=neutral, PublicKeyToken=ed0eb71059ea593b' or one of its dependencies. The system cannot find the file specified.

Please help.