savox and hrs

[charlie2]

i have a savox 1257 servo and i am having problems with it.the problem is if i try to use it with my futaba hrs system it does what it feels like some of the time,turn right then let go of steering and the sevo may turn left and flutter but if i try it in normal fm frequency it is fine.as the servo is digital i thought it would be ok?any ideas?thanks