Auto hold rejected

I have some problems getting the auto hold position to work.
Have no problem with compass or gps lock .
every time I toggle the mode switch to hold it gets rejected.
one more time I have 9-10 satellites GPS lock and compass is healthy.
please advice.

Can any one tel me what is wrong with auto hold mode .it gets rejected tho I have GPS lock.
I have the pixfalcon FMU V2.
It works magnificent with the previous firmware .
dos anyone have the same problem?..

If you upload a log file it could help us to check why it does not allow the mode change.