I'm trying to track a process on system running Windows Vista, I tried creating a user Data Collection Set in Vista's "Reliability and Performance Monitor" (perfmon). What I did is the following: 

1. Under "Data Collector Sets" -> "User Defined" -> Right click and "New" -> "Data Collector Set"
2. In the wizard I chose "Create Manually" -> Tick "Performance Counters" -> Click the "Add..." button
3. Choose "Process" -> "% Processor Time" (Or any other counter for that matter), Choose my instance (for example, iexplore) and click "Add >>"
4. Confirm the rest of the wizard and start the set

What happens is that the set runs and creates a log file, but when I stop it and try to open the file, none of the instance-specific counters show up, neither in the graph nor in the legend. If I add a counter with "\_Total" as the instance I can get results.
I've also tried adding all counters for a specific instance (\Process(iexplore)\*), in that case I got results, but they we're for "\_Total", not for the specified instance.

General info:  

Windows Vista Business 32-Bit  

Intel Core 2 Duo CPU E6550 @ 2.33Ghz  

2GB Ram

If this is the wrong place to ask this question I apologize and ask that you move it to the correct place

Thanks in advance