I have the same problem with the A-10C using a x52 stick and throttle.
All my other aircraft ( f86, SU 25 and KA 50) work perfectly fine.
I cannot get the throttle's to move at all, when I am doing a cold start.
Even the keyboard commands don't work,very very frustrating.
Now during the cold start I have no roll command, just pitch and rudder.
When I launch on the runway or in the air all works fine...WTF
I have reinstalled, deleted profiles, all that I can think of, but nothings...sigh