Hi, I'm new to using a  cutter. I purchased a USCutter SC 50" from someone who upgraded. He said it was working fine. This was about 6 months ago. I just had the time to set it up and try it out. I went through the whole process of getting the USB to serial converter (Tripp-lite) got it all set up, computer and cutter talking....but no cutting. It appears to send the file but the screen on the cutter just says "is now cutting". Nothing moves at all.  I ran the test using the test feature on the cutter and it acts like it is cutting but the blade doesn't drop down.   Any suggestions?  Thanks, Cindy