Windows 2000 to XP communications sign on problem

I have a sign on problem which is obviously pretty simple but I can't seem to be able to solve.

To sign on across W2k workstations I use the following line.

NET USE \\My Computer\ipc$ mypassword

With Windows XP on my reading of the documentation the same command should work on both os.

However when I use a Windows XP workstation to log onto a W2k workstation I get the following message

System Error 1326 unknown user name or password

Why does this work in one os and not the other?

Any explanation much appreciated

 

Thanks very much for this, Steve. Link right on the mark.