EnumObjects Error

[manju]

Hi all,
When I am trying to discover a Win XP resource for Performance Data
Collection , using win32pdh.EnumObjects() function call, I got the following
error :I specified the IP address of the remote XP system.
pywintypes.error: (-1073738789, 'EnumObjects for buffer size', 'No error
message  is available')
While I am able to discover a Win 2003 resource for Performance Data
Collection with the same function.
I suppose there is some problem with Win XP security.The Authentication
level has to be set to PKT.
Please give some suggestions
Manju