Too many mapped drives.

I have a win98 machine connecting to a 2000 server.
Everything works fine except for the mapped drives.
On login, the win98 machine executes a login script from
the server that maps:
G:\\server\sage
w:\\server\company
U:\\server\users

This works fine.... However for reasons unknown the client
is mapping extra drives. These drive are definatly not set
to reconnect at logon.
The client now has the above drives plus E: F: H: I: Z:
all mapped to \\server\users.

There are many other users running the same script with no
problems.

Any help would be much appreciated

Jim