I would bet you loose USB connection?

How do you use USBService? Manally, Timer interrupt or POST148?
http://www.picbasic.co.uk/forum/show...&postcount=148

I prefer POST148 now... kinda stuff you no longer need to care about First USBDemo version was using Timer interrupt.

I can't remember if i already used PULSIN, i pefer the CCP or Timer route.. but it's me