Newbie advice on correct way to debug please

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From: Andy Storer (AndyStorer_at_discussions.microsoft.com)
Date: 02/04/05 

Date: Fri, 4 Feb 2005 04:49:02 -0800

I have an app which runs fine on the emulator but when launched on a real
device immediately quits with no error messages. I tried compiling a debug
version but no text gets displayed in the debug.txt file on the device. What
am I doing wrong?