mamba max problem

[rcsammy]

ive checked the radio settings for both of them, reset the profiles to default to make sure aswell but no luck

ive had it on castle link, turned the lvc off and tried it but it was the same
cant be switch as its not got one

cant work it out at all, hope i wont have to send them back... really weird to have two do this in seperate setups one after the other