Problem Transmitting code...

I'm using Girder ver 3.3 togheter with 2.6.9.0 of dll and usb drivers version 1.3
I've added a command to Girder, chosen USB -UIrt under plugins, left everything as default and learnt a new command (which works fine), but when I hit F5 afterwards the UIRT blinks but nothing happends...
Any clues anybody, or is my new pice of equipment not working
Tom
I've added a command to Girder, chosen USB -UIrt under plugins, left everything as default and learnt a new command (which works fine), but when I hit F5 afterwards the UIRT blinks but nothing happends...
Any clues anybody, or is my new pice of equipment not working

Tom