Qt Creator - problem with debuging

I use netbeans with mingw (gcc 4.5 gdb 7.2) and all works fine but netbeans is to slow so I want try qt creator.

I install qt creator 2.0.1 without mingw(I alredy heav it). my project compile and run fine.
when I tr debug I get segmentation fault. application dont start. how can I slove this issue?

edit

Now I try it with netebans and also this dont work. even if I use dgb from command line I get this error.
any sugestions?

sory for my poor english

Given the context, the "segmentation fault" is most likely in your program. If you get it (and your program was compiled in debu mode) you should see the problematic line in the "Stack" view.

I found my problem. comodo firewall cause this isse.