RE: DX7 and AR7000 won't bind
The Bind is usually done through the switch, therefore you have to use the battery slot on your RX for your bind plug if it did not work with the switch. If it will not work with the switch it is simply because it is a 2-wire and not a 3-wire cable on the switch assembly, and the Bind process requires all 3 wires. Here's how I did mine; I went to my Rx, removed my switch plug from the battery position and plugged it into one of the Aux positions. Then I took my Bind plug and inserted it into the BAT position I had just opened up. I followed the rest of the binding instructions with no other changes. The premise here is to make sure that your Bind plug connects completely with your BAT position on the RX, which means a three-wire cable or switch, or by just plugging it straight into the BAT postion and leaving out the middlemen!
After you're all done binding successfully, you can move your switch wire back to the BAT position. This solved it for me, I had the same thing happen.
Jim