No Autmoatic Updates 0n SBS2003 Edition

I have successfully installed avast! SBS2003 server edition onto a Premium version of SBS2003 server with ISA enabled.

The server will manually update the virus definitions and program updates OK, however, when the server is left unattended and I check the Event Log, I am getting the following errors quite regularly:

Type: Warning Event ID: 90 Category: Client
Function setifaceUpdatePackages() has failed. Return code is
0x20000004, dwRes is 20000004.

Type: Warning Event ID: 90 Category: Client
An error has occured while attempting to update. Please check the logs

The server is not automatically updating avast! and cannot understand why, I have reinstalled avast! and exactly the same is happening.

Can anybody help solve this problem and advise me what to do next?

Many thanks

Adrian

Iā€™m getting this same thing. Can someone explain what is going on?