I've attached Ollydbg to debug a service, but when I start Run, the program runs briefly, then OllyDbg freezes!!!

I can't do nothing because the OllyDbg window does not respond, so I must kill the process I'm debugging and restart the debugger!!

What can I do??

Please help...

ollydbg is a ring3 debugger, look for softice or other ring0 debugger.

Ricardo