Win 7 HID multitouch trouble

Hi All

I got my hands on a windows tablet with multi touch. when i try to use HID (Devices), it shows 3 different touch controllers, all named the same with integers 1 and 2 after the last two.

The first device outputs data when touching the screen, but copying the report descriptor to HID (Decode) does not give any outputs.

To me it seems like a broken Report Descriptor or?

any ideas?