I pulled the radio modules off and did a direct connect - and it didn't work! All it was was making sure the internal oscillators were calibrated. Then it worked so my hopes were high for connecting the radio modules again - but alas, it was not to be. just doesn't work for some reason - I think it has something to do with the internal setup of the radio chips - for some reason (maybe their brand name) I thought it would be easy! And would just transmit data as it came into it's pin - but apparently u have to set baud into the receiver and there r a few other options which make it a bit complicated for a beginner.