Cutter works great in test, but no blade pressure in a real cut?

[RazorConcepts 0]

I'm trying to set up my 14" MH cutter. With th blade  pressure set at 100 and about 300 speed, the built-in test pattern comes out beautifully. 

 

However, when I switch to sending over a design through Sign Cut Pro, the cutter begins to cut with little or no pressure - it leaves no marks on the vinyl! The software speed/pressure is greyed out on sign cut, I'm assuming the MH series don't support that. But why would the test cut come out great, but the actual design has no force?

 

Thanks!