ArduinoBT, "SET CONTROL BIND" troubles

I am trying to program the pio's on the WT11. But whatever I try I always get a syntax error on the "SET CONTROL BIND" command. I tried it after the reset in the initialisation program and in the program from sondag: The line of code that doesn't work: Serial.println("SET CONTROL BIND 0 4 FALL INFO"); I tried 04 instead of 4, CHANGE or RISE instead of FALL. I thought that it might the length of the string, but: Serial.println("SET CONTROL BIND 0 4 "); to switch off the bind is shorter then the SET CONTROL ESCAPE line and it still gives a syntax error. Is there some hidden feature to disable the BIND commands?