Dx4s problems
 

Hello all.
Bought a dx4s in march and just tried it but can not get it ti bind to my spektrum receivers. I know the receivers are ok aa my dx3c work ok with them. It's registered on spektrum Web site and says it needs updating. On the about screen on the dx4s it's say version 2.1 and kernel r1. The update on the Web site say 1.2 so is that the kernel can anyone check there dx4s and see what it's says if you have one. Have tried to download the update and put it on a so card but can't do this has anyone updated there dx4s at all and how did you do it. Really want to get this working now so any help would be good.
Cheers Paul.