Hi there!
I am having an interesting issue with Mach4.  I have been setting up everything in Mach, and thought i was ready to run a program!  When i tried to run roadrunner, it runs the first line, and hangs on line 2 forever.  I don't see any errors, warnings, or other signs.  Machine jogs around just fine!  Not sure where to start here.  Running Code from MDI does not work either.  
For reference, i am using Mach4 hobby with a PMDX-424, and mitsubishi MR-JE servos (left over from a project at work :-) )
Thanks in advance for your help!