My local model shop are pulling their hair out,I,ve now tried to fit 5 TTS decoders into a Hornby R3443 ,I use a Prodigy Advance2,when programing on thePrograming track I can hear it programing but when you try to run it I get nothing no sound no motion.My model shop says 85% of these decoders are returned to them with the same problem & they have returned all their stock to Hornby,Is this common or have this model shop just had a bad batch???