I'm running ClrProfiler for the first time to profile my web app, and it
keeps getting stuck at this msg box: "Waiting for Asp.net to start common
language runtime - this is the time to load your test page." even after I
launched my app and aspnet_wp.exe is running.

I found some old post, a person mentioned that I need to make sure I need to
run my aspnet with system account instead.  Do you know how to do this
account switching?

Thanks for your comment and advice.