vampire sr1 trouble

[Jez]

never had any issues till now.switched car on saturday night after 3 weeks break.sterring works but no throttle response.same receiver and don't recall anything amiss last time i used it.tried re setting speedo up but nothing lights up when when either neutral,full speed or brake are applied.before i bin it has this happened to anyone or is it common and can it be fixed?what should i check?thanks in advance.