EM registration info not sticking

My Window XP professional PC has SQL 2000 Client tools
installed.
SQL Client tools : SQL 2000 SP3
SQL Servers : SQL 2000 SP3
I also registered a few SQL servers in the Enterprise
Manager. Whenever I logged off and logged back on again,
I lost all the servers registration.
I noticed that when I exited Enterprise Manager, it
modified the file "C:\Program Files\Microsoft SQL Server\80
\Tools\BINN\SQL Server Enterprise Manager.MSC"
Is there any other files to be modified to keep the
registered settings e.g registry etc ?
Any ideas to save the settings when I log back on again ?
Thanks.I don't think I am the administrator of my machine. All
the machines here have to be applied "Local security
policy".
And I needed to know what registry settings and files
needed to keep the SQL server registration settings of
Enterprise Manager. Thus I can tell the network
administrator of what kind of permissions I needed.