Apu master not working

Hi every1,
i have a very frustrating problem.
For some unknown reason I cannot get the apu master to turn on.

The button Is working ok as I have tested it . There is communication thru the network to FSX as the lights turn on the a/c when I activate them.

Any reason why the APU master will not start?


Thanks

Michael

check batt volt, have you try using external power ?

Tried everything!

Silly me pressed every button except the Engine 1 & 2 & APU fire switch ....... presto Apu master starts :)

(walks off tail between legs)