Windows 7 Touchscreen focus issues .

Hi
I've encountered a weird behaviour .
the running machine setup :
Windows 7 embedded PosReady ( win7 version for POS machines )
IBM POS Hardware with Elo Touchscreen drivers .

the Problem:
My application consists of a Form with different controls in in ( some custom , but mostly native ) .
a panel on that screen is firing MouseClickEvent only on the second click ( touchscreen ) .
the KeyPreview on the Form is set to True .
I added logs to different events of the form and the control itself
what I've found out is that the control loses focus sometimes and the first click gets it back and the second fires the event .

This sounds really easy to solve , focus problem .

But this happens only on the IBM hardware with Windows 7 and the Touchscreen drivers
another IBM with XP has no problem.
Another IBM with Win7 no touchscreen drivers no problem .
Even if I connect to that PC with terminal services still no problem .
Only if I use the application from the Peripherals connected to the Machine itself .



Any Idea of how to attack this will be great !