Windows 7 Hangs

We have a .net app. While navigating the screens  Win7 hangs.  The details of the hang is given below

http://stackoverflow.com/questions/12145436/the-system-hangs-while-navigating-to-wpf-screen

I generated the hang dump for the application.  The details of the dump analysis is available at 

http://stackoverflow.com/questions/12191192/how-to-analyze-the-kernel-dump-in-windbg

I am not able to further analyse the hang.

What should I do?

How can I report the problem to MSFT?

Can somebody help me?

Thanks!

hh