I have been on a mission lately to debug a problem I had with parts of my file not being cut.
In summary, it wasn't static or memory but more likely Signcut Pro.
I have a US Cutter Refine MH 721. I running XP and CorelDraw X4. I was using Signcut Pro but was having difficulties on larger file size cuts. It would skip over large portions. Sometimes it would just misbehave. So I grounded everything, didn't fix it. I bought the larger memory, didn't fix it. I installed Signblazer 6.05, fixed. Not exactly sure what the root cause is but has to do with how data is being transfered to the plotter.
Signblazer 6.05 does not have the Refine drivers but I'm using RedSail RS720C which is working very well (note: The DMPL driver worked but the scaling was slightly larger than actual size (1"x1" was more like (1.01" x 1.01")).
After all this research, I decided to make it more simple for newbies. If you want the latest and best version of Signblazer Elements with a crack that gets rid of trial mode, visit www.mystat.com and scroll down to the bottom.
Also, we added a helpful user guide for MH series cutters that addresses grounding issues, loud printing, rip software and others:
http://www.mystat.com/user-guide-tips-fixes-uscutter-mh.pdf
cheers.