New transmitter. Cannot get working

[Chop chop]

Have just brought a second hand etronix 2.4 transmitter and have put receiver in car and blinded with no problems.

After taking the bind plug out the car:

- constantly moving even with th hold switched to 1. If I switch to 0 the car goes about 3/4 top speed.

- wheels automatically switch to the right and I have no control over steering at all.

I have reset the transmitter as it was second hand but makes no difference.

Would welcome any help as starting to pull my hair out

Thanks