Mapped drives in XP

I am having a problem getting mapped drives to remember the password to the share on XP. I have mapped the drive and told it to use another user and password and reconnect at logon but it will will not reconnect. When I click on the share to open it I get a dialog box that has the correct username. I then enter the password and the share opens and is good until logout. I have also stored usernames and passwords under manage network passwords but this does not work. It has worked on past workstations but not on these new ones. It does work on the mapped printers though. The only way I can get these mapped drives to connect is to make the workstations password the sames as the mapped drive password.

Thanks,
Kevin