Problem with pdh.lib / pdh.dll

Hello all,

I have a problem with an application I created. It uses the pdh library to
display CPU and memory loads.
I had problems to make it work, so maybe in my tries I changes something on
my workstation, but I can't remember.

The problem is this : on my workstation, all works fine, CPU and Memory
counters are OK. But when I install my software on any other Workstation,
Counters' value is always 0

I have downloaded another software that uses pdh.dll, and it works fine on other posts
So, something must be wrong in my code, but I can't figure what...
Does anybody have an idea ?

Thank you !

Vincent