DSF Loopback Sample not working

mooni

Hi all,

I installed DDK and DSF few weeks back and ran Loopbackdevice sample at that
time. I called MessageBox API of windows.h in OnWriteTransfer event. At that
time it was working fine and successfully displayed message box when I ran
RwBulk.exe.

But yesterday I tried to re run it but now when I run RwBulk.exe to send
data to my simulated Loopback device it returns immediately and no message
box is displayed. What can be the reason of it?
I think problem is with event firing and OnWriteTransfer method is not
invoking up.

Can anyone help me?

-Taimoor