Sounds like my day. I maidened my trainer today, as well.

And....I had the same buddy box problem on my 7CAP.

Here is a tip that worked for us - someone might be able to fine tune this information, but it worked for us.

Since your radio is a computer radio, a regualr buddy box won't work. It has to be another computerized radio. Make sure that your radio is set to PPM and that the other is set to PPM as well. I believe there is a setting in there on the main menu, under "trainer" where you can change it from "inhibited" to "off". I believe it has to be set to off.

We couldn't figure it out, and eventually had about 4 guys out there working with the radios. The JR guys were arguing (jokingly of course) with the Futaba guys. One of the JR guys figured out how to do it on my Futaba radio.....go figure. Anyway, the tip above is what I was able to glean from the commotion before having a fixed radio placed in my hand. Might need to be tweaked by someone who knows for sure.

It was a great day.....for both of us, it sounds like.