H8i guys and ladies

I have this small problem.  Having input my licence code and finally being able to load the 'G' code for my first attempt, there is no output to the cnc machine.  I have had output on odd occassions and  shortly after my computer stated that it had a critical error.  The licence comes up to me and the code runs as if it should be giving output but the machine stays silent.

Can you go into the Mach3 folder and run the Driver test and see how that goes. Actually sounds like it could be a low volt parallel port but if you could list your hardware( Drives, motors, breakout etc) it will help. Also if you could attach your xml file we might be able to find a problem, it will be the xml forthe profile you use, ie if you use Mach3 Mill its that xml, if you use a custom profile its that one.
Hood