I am using a mac PowerBook G4, I have CS3 and SignCut X2 installed. I used the plug in to send it from CS3 to SignCut, every time I try to cut, the software crashes, what am I missing? I did install the drivers and purchased a MH721. appreciate any help, I am new to cutters and hope to get this running soon. I also tried both USB ports, but the same happens on both.