Closing CF 2.0 application on device

Hello,

I am developping with Visual Studio 2005 Whidbey beta a pocket pc
application. When I close the application on my device with the
controlbox "OK" or this.close or this.dispose methods, 5 threads still
running and I can't start it again.

So I tried to deploy a simple application with only one form and I
just added controlbox=true and minimizebox = false and the same
happened. 5 threads are running and none are stopped after I close the
application.

This problem is not happening with the emulator. Is it a bug or did I
forget to install something on Pocket PC or a line in the code.

Thanks for your help.

P.S : I checked the processes with Remote Process Viewer tool from
Microsoft Embedded Visual C++. My pocket pc is a Dell Axim X30 with
Microsoft Windows Mobile 2003 Second Edition