Ko esprit 3 2.4 problems with binding

[samd]

I've had some real trouble with my ko this Sunday, I could turn it on before a race and nothing , the try 10 or 15 times to re bind. I tried a new receiver and cleaned out the module, tightened up the connections everything. End of the day I found I had more luck rebinding as far away from the other cars/people as possible. Can anyone give me some help with this or had the same problems with ko? Thanks sam