Midi suddenly behaving strangely help! SOLVED

I use midisport 8x8 which is usb to the pc. I use it primarily now as an interface for my two keyboards: a desktop keyboard and a full size keyboard. Desktop keyboard is inputting at ch 8 and full size on ch 2. I've set sonar to receive and send on all channels so all should be well. Normally I can play on any one track from both keyboards. Suddenly my full size keyboard is repeating the notes, so I play a note and it is immediately followed by the same note again with sustain on. Really need my full size keyboard for this jazz project so any help gratefully accepted

Jill 

Reset keyboard to factory default and all is well