Clients are getting access denied errors when trying to map drives to one particular server in the login script.
Client is 4.91 SP2 on Windows XP sp2
Just recently installed Zen 7 agent (no previous zen agents installed).

Initial troubleshooting indicates that the problem goes away if we un-install the ZFD agents.

It does not happen every login but it is very frequent.

Manually trying to map the drives after a login also generates the Access Denied errors.

Anyone seen this behaviour.

Below is a section of the login dialog window:
....................................
COM-SERVER
LOGIN-LGNWNT32.DLL-890: The specified server is unknown.
Your current context is Office.COM
User: Greg-s Context: Office.COM
Your current tree is: COM
You are attached to server COM-PROXY.
LOGIN-LGNWNT32.DLL-100: Access has been denied.
LOGIN-LGNWNT32.DLL-100: Access has been denied.
You are attached to server COM-PROXY.
LOGIN-LGNWNT32.DLL-430: The following drive mapping operation could not be completed.
[INS S1:=COM-SERVER\SYS:\LOGIN\NAV]
The error code was 8885.
.................................................. .....