Hey i can tell you right now you most likely have the wrong crystal. You need a Berg single conversion crystal for the picco board plus's reciever. I had the same problem and it has to match the channel your transmitter crystal is on. PM me if you need anythign. I been through it all with the piccolos. Actually quite entetaining to fly around your house while your sitting on the couch.
Build one of these to tune in your tail mixer and gyro on the picco board. It allows your heli to spin freely so you can see what adjustments need to be made to your mixers. Mine is dead on . With the heading hold module and my mixers tuned properly my tail does not budge from where i put it.