Win 2000 Cannot Access XP Pro Shares

I ran into a strange problem while trying to access a shared folder on XP Pro from a Windows 2000 system.

The Win 2000 could see the shared folder, but when I tried to access it I got: Not enough server storage is available to process this command.

Both systems had the same username, password, and admin rights.

Interestingly enough, the XP Pro system could see and access shared folders on the Windows 2000 system.

To solve this problem I did two things:

1) Updated the XP Pro system with the latest patches.
2) Used regedt32 to change this key on both systems to the maximum value of 0x32.

HKLM/
System/
CurrentControlSet/
Services/
Lanmanserver/
Parameters/
IRPStackSize