Problem adding custom performance counter instance

[Navin Mishra]

Hi,

I'm having problem adding custom performance counter INSTANCE in an
ASP.NET web service whose miltiple instances could run hosted by different
IIS AppPools on same machine. I can update my custom performance counters
WITHOUT instances just fine but when I try to specify instance name then the
counter is not updated at all and there is no error thrown also. I've
followed MSDN example to specify instance name:

// Assumes category and counter have been created.
System.Diagnostics.PerformanceCounter myCounter =
new System.Diagnostics.PerformanceCounter(
"cat","counter","instance1", false);
// Set the raw value to automatically create instance1.
myCounter.RawValue = 100;

But it doesn't work in my ASP.NET web service If I don't specify instance
name, it works just fine.

Has anybody seen this ?

Thanks in advance and regards

Navin