can't get my 9920 and 9xl setup to work with ubec

[nl12]

no luck, with ubec its like my throttle channel is blocked, i thought all i had to do was disconnect the black jumper (permantly right?) and plug in the ubec to the recever in the slot marked B for battery, after I do this I reprogram it and it still dont work, without the ubec it will work ok, but i dont think I can run 20 cells with the bec on the controler can I? I have heard u can disconnect a wire instead of the jumper, I may try that, but I dont know what wire that is. At this point I am very frusterated with this thing. I just dont know what the problem is, it all seems ok till i disconnect the black jumper then it doesent seem to recognize the throttle although it will let me program so it must be receving throtle signal I would think?