Without your actual code and error message, we can't really help... Do a search for USBDemo in here. Also have a look at the following post which is a revamped version of USBDemo for pbp 2.60
http://www.picbasic.co.uk/forum/showthread.php?t=14945

I use MCSP and PBP 2.60c, AND PBP3 with the latest version of Microcode Studio Plus with MPLAB latest version (8.73)

is there a link where I can get a PBP2.60c for free not trial edition?
At least you had the guts to ask.

If you're looking for freebies, then you want to use assembler of C18.