Renoise and FL rewire problems

Hey guys i would be glad if some one can help me here. I used renoise as a master with rewrire and slave reason for a lot of time and have no problems at all, but when i try to do it with FL studio both DAW`s arent synced in any way - their bpm is not the same, if i play one of the the other one dosent play and also my keyboard stops functioning in Renoise - cant write notes, even the play button(space) doesent work. Anyone here who knows what the problem might be?

thanks for the suggestion seems logical. i do hope thats the reason for the problem i will check it when im home and give feedback