Password not working anymore after I rep

on a compaq dl380.

The drives are (4) 9 gb scsci drives.

Replaced with (4) 18 gb scsi drives

Installed win2k server on new drives but same machines.

Replaced the 18gb with the original 9gb drives

Booted fine but the problem is now none of the passwords are working. And the original 9gb drive is not trusted.

With the 18gb drives installed win2k server and named it the same as the 9gb (master) could that be the problem? Anyone have any suggestion on how to fix it?

TIA
Daniel