How about this? I asked this same question on another board and I got this reply:Quote »From Microsoft Knowledge Base:
http://support.microsoft.com/d...97694New Drive or Mapped Network Drive Not Available in Windows ExplorerApplies ToThis article was previously published under Q297694 SYMPTOMSWhen you create a new volume on a local diskplug in a removable disk with existing volumesplug in a removable drive (for example, a USB floppy drive or PCMCIA flash card)add a physical hard disk or CD-ROM drive to your computeryou may experience any of the following symptoms: an existing mapped network drive is no longer available in Windows Explorerthe new drive is not available in Windows Explorerthe new drive appears in Windows Explorer, but when you open it the contents of the existing drive are displayedthe existing drive appears in Windows Explorer, but when you open it the contents of the new drive are displayedAfter your computer starts, the network drive may be replaced by the new drive.After you disconnect the new drive, the mapped network drive letter has the same logical drive letter that it had before you added the new drive.You may receive the following error message when you start your computer: The local device name is already in use.NOTE: The new device (or drive) may appear in Device Manager or the Disk Management console. CAUSEThis behavior occurs if you map a network drive to the first available drive letter after the drive letters for the local volumes and CD-ROM drives. When you install a new device or volume, Mount Manager, which assigns drive letters to volumes, does not recognize the mapped network drive and assigns the next available drive letter to the new device or volume. This causes a collision with the existing mapped network drive. WORKAROUNDTo prevent this issue from occurring, when you map a network drive, assign the highest available drive letter to the mapped network drive.To work around this issue if the new volume appears in Disk Management, specify a different drive letter for the new device or volume. To do this, follow these steps: Right-click My Computer, and then click Manage.Under Computer Management (Local), click Disk Management.In the list of drives in the right pane, right-click the new drive and then click Change Drive Letter and Path(s).Click Change, and in the drop-down box, select a drive letter for the new drive that is not assigned to a mapped network drive.Click OK, and then click OK again. Both the mapped network drives and the recently installed drive appear in Windows Explorer. STATUSMicrosoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. MORE INFORMATIONBy default, Windows XP assigns mapped network drives to the highest available drive letter, starting with drive Z, to avoid drive letter collisions. However, by default, Windows 2000 assigns mapped network drives to the next available drive letter after the drive letters that are assigned to local volumes and CD-ROM drives. The information in this article applies to:Microsoft Windows 2000 ServerMicrosoft Windows 2000 Advanced ServerMicrosoft Windows 2000 Datacenter ServerMicrosoft Windows 2000 ProfessionalMicrosoft Windows XP Home EditionMicrosoft Windows XP ProfessionalMicrosoft Windows XP Media Center EditionMicrosoft Windows XP Tablet PC EditionLast Reviewed: 5/28/2003 (3.0) Keywords: kbenv kbHardware kbinfo kbnetwork KB297694