Crash Hunting

Hey there! Got a question again... In my Extension i call a loop function (Windows Message Loop). Everythings goes fine, and the function works as expected, and returns correct values. After the function returns, i just echo that everything went ok, and then the script ends. (with ?>) at this point (while quitting) the whole thing crashes. I just don't know why! Execution never reaches my ZEND_MSHUTDOWN_FUNCTION, so i really don't know where it crashes. Since i'm working on Windows (uh oh ;o)) i can't debug the thing, because i don't know how i can attach the MSVS 2005 debugger to php and still have all debug symbols loaded correctly... it simply doesn't work. Any comments appreciated ;o) Thanks in Advance, Markus