When I press "tab" to open the MPG window (leaving the mpg window open) and I try and open the config window for the shuttle the window does not open. 

Even after I exit the mpg window I still cannot open the config window.  I need to shut down Mach3 and restart. 

If I go into the mpg window then close it before I open the config window - the config window opens.  But once I have opened the mpg window and tried to open the config window it does not matter if I close the mpg window or not I still cannot open the config window.

Ok, thats enough words. Minor problem.

Dan.

My bad,

the problem was a either that I had the incorrect shuttlepro driver or my USB controller needing updating.  I did both and all is well in the world.

Thanks.

Dan.