Is that the default FS9 Boeing 777?? wach closely and see if there the glass in the cockpit .....The gauges of this plane Could be incompatible in FSX or OR perhaps you didn't paste them, try by looking inside of the plane folder look in panel folder a file name panel.cfg open with notepad there are in window01,02 03 etc, a list of the gauges required, check if you put them in the main gauge file OR better paste in the same panel folder ...Just drop them in there all this :gau or .cab it work the same ,see if work other wise you may have to wait until a designer release a FSX Boeing 777-300 ...
Cheers
EDIT: It seems like you are running in Flight Simulator 9 "a century Of flight" I mean as far I can see Looks as FS9 , this is a part of forum only for the new Flight simulator 10 or FSX ,or am I looking wrong? 
 
 