Ok. Not sure why you can't get through. sorry for the hassle.
In that you can't bind the to one receivers but another receiver works OK it's most likely the tx. And since the receivers don't even go into bind mode, there's something wrong at the recever end.
The 7 ch rx and the 8 ch receiver have the plug oriented 180 to each other. So, you might try flipping the plug from the battery that's plugged into the receiver over (rotate 180 degrees) and try again.
When I try to send a e-mail,
The error message that I get is that there is a problem in the Set Associations Control Panel. I will have to check it out.
I'm aware that the Rx plugs on the 7ch and 8ch Rx's are oriented 180 degrees to each other (I feel that Airtronics needs to make some improvement in this area)
Over the weekend, I tried to bind the 8ch Rx again, It still wouldn't come on, after closer inspection, I discovered that the bind button was sticking. I gently pried the bind button up and then worked it up and down. I have some electrical contact spray cleaner, do you think that it would be ok to spray the bind button?. anyway I was able to get the Rx to bind after I was able to free up the bind button.
I then tried the binding procedure on the 7ch and after pressing the yes button, the Rx continued to blink, it wouldn't bind until I pressed the end button. (Is that normal?) Anyway now both Rx's are bound to the SD-10G. For some reason all of my Rx's that were bound to my SD-10G before I sent it in for the RF Board update, lost bind with the Tx.