Radias not starting the sequencer with Midi Keyboard

[Matthiaskeul]

I am looking for an answer regarding the start and stop procedure with my Radias. As long as i use it with the original Radias Keyboard it automatically starts a sequence when i hit a key and i stop a sequence by clicking on the sequence ON button . But using Radias with any other Midi keyboard does not start a sequence and the ON button doesn`t start. Does anybody know what to do? thanks, Matthias