My PMDG 747 on start has the gauges and if i change my view the gauges are missing like this:http://img389.imageshack.us/img389/7931/misinggg2.jpgcan somebody help me with that? and btw, does somebody know how to fly PMDG aircrafts in GPS mode for NAV hold? because i'm finding it hard to do some flights because i can only do a flight with IFR.

I assume that you have electrical power connected to the aircraft and on the busses. If that is the case then you may have a product activation problem. Have a look at http://ops.precisionmanuals.com/wiki/PMDG_Product_ActivationThis aircraft uses RNAV as primary NAV. The GPS is there only to provide position info. it cannot be used directly as in light aircraft.CheersSteve