Quartz external touchscreen help!!

[Lukewoods]

Hi,

So I’ve connected an external touchscreen to the quartz with dvi and usb.
If I touch the external screen it selects stuff on the quartz screen, if I go to tools and change which touchscreen is the internal screen it then throws the calibration for both screens right out, I then go to calibrate touchscreen and it won’t let me touch the crosshairs.

Any ideas??

Version 11.4