Merge replication in SQL Server 2K - Resolved.

I'm trying to set up replication (merge), and in the "Configure Publishers, Subscribers & Distributors" wizard I get the error:
"SQL Server agent currently uses the system account which causes replication between servers to fail. In the following dialog box, specify another account for the service startup account".

So, I create a new Windows user & try to use that as the startup account, and get this:
Error 22042
xp_SetSQLSecurity returned error -2147023564 "No mapping between account names and security IDs was done."


What am I doing wrong?

NM - got the answer :)