Radios

Strange - I never had any problem.

Switch the transmitter on, and wait for it to start up - 
then press menu once. That takes you to the 'page' where you can select different models.
Press page once. That takes you to page 2, titled model set-up.
Press the down button about a million times, till you get down to near the bottom of the list, and can see receiver number - bind - range
Select the receiver number you want, then step across to the bind. the tx will start slow beeping.

Now for the receiver. plug in any one servo, just so you can see if it works. Move the rx about four feet (a metre and a bit) from the tx, or it will swamp it and refuse to work.
Then a lipo and speed controller, plug it into the throttle socket (you need about six hands) or use the easy option of a normal four-cell nimh flight pack and a switch!.
With the receiver switched OFF, press and hold the bind button - then turn the power on.
The flashing light in the rx should go steady. Let go of the bind button, and switch the rx off.

Press exit on the transmitter - twice. That takes you back to page 1
Switch on the rx, and it should be bound.

Remember if the tx and rx are too close together, the rx will swamp and not function.

I asked the question can the X7 and the X8R work together, yes they can, it sounds like your firmware is not correct.
 

YES!!!!   I'm good hey?

It would appear that you have some mixers selected!
You should be able to find a thingy in the settings page that switches all mixers off, and gives you a clean start.
Failing that.- Delete the whole model and start again!

Two possibilities - either you've missed a step in the initial set-up/calibration of the sticks, so you haven't told the tx to use the function on that channel
or
You have the rudder output set to 0% instead of 100%

That is probably too 'techie' for BB!     - - - - (and me!) - - - On these radio tx's, there is a screen that shows you what the servo movement would be, in the form of a bar-graph - as you move the sticks.