Cannot see all already mapped network drives in My Computer

Hi,

I just experience some little trouble with XP and mapped network drives.

One of the clients is running SP2 and mapped with 2003 server folders by
Logon scripts. They both are domained.

The user tried to access several mapped drives, but she could nto see any in
my computer. Try to access them by typing the drive letters in "Start" "Run"
but result is the same. When I tried to "disconnect" them, it is so wierd
that you could see all the "connected" and "mapped" drive there.

ALso, there are two ways to access to the network drives, the first is to
open up any applications and go to use the Open. You will see all them there.
The second way is to disconnect them first and re-mapped them.

I also have the user to reboot and re-logon, but the result is the same -
can't access those mapped drives.

Any ideas why this happens? And how to resolve this (by not necessary
re-mapped them).