Hello, We have just received our new S48 and are very happy with it ( a bit of an upgrade from our old Fat Frog!) However the external monitor is perplexing me, we have a ViewSonic TD2220-2, when I select to calibrate the monitor I go through the motions and the message 'calibration complete' comes up and it asks me to press Enter. The internal screen displays a syntax keypad but seems to be frozen and won't allow you to press enter. The only option at this point is to restart the desk, the external monitor then works, but when I come to use the desk again the touchscreen stops working again. Any thoughts to get around this, or am I doing something stupid? Haha. Cheers!