Starting my first UGV project - need some starting help

I just bought a Futaba f-14 40mhz transmitter, but got a problem:
So, Digital pin 1 of the WP controller is connected to channel 2 on the receiver and it works good(forward and backward), although, digital pin 0(steering) doesn't work on any channel, it just doesn't react on any of the channels of my transmitter...
What is the problem here? I can't find it.
The strange thing is that it worked very good on my previous futaba t6ex 2.4ghz transmitter.

I'm still using the standard code:
http://www.exp-tech.de/service/Sample%20Code/Wild_Thumper_Controller.zip

Any help would be appreciated very much!