Emacs PDB Windows

[Elric02]

I'm trying to get PDB working on Emacs 2.1.3, Python 2.3, Windows XP.
Whenever I try to run a Python file from the Emacs buffer using the
PDB command I get the following error
"spawning child process: invalid process"
I've tried the exact same command from the command prompt and the
debugger works properly.
If anyone he has any ideas for a completely lost newbie that would be
much appreciated...