When using the xp_sqlagent_proxy_account in SQL 2000 on a windows 2000 server, the gives a message of
A required privilege is not held by the client. when using n'GET'
and
Error executing extended stored procedure: Specified user can not login when using N'SET'

This only happend on 1 out of 3 window 2000 servers being used.

What do I need to check on either the SQL or Windows 2000. The SQL rights are the same on all servers