Hello I need Help

I buy a wacom cintiq and i have aster for 2 users on windows 7

I need Help to configure my wacom on user 1but the program say than i cant have 2 monitors on 1 user

Please help!

Cintiq user here.

This wrecked my brain too, but I figured out why this was the case.

You can't have two monitors for one workstation when both workstations are sharing the same graphics card.
If your CPU processor is sporting an integrated graphics, then you'll have to enable that on your bios so that you can use both your card and the CPU itself.

If not, you'll have to buy another graphics card.