Didn't you see the shots? How come it work for me ,Both the original FS9 AND THE DOWNLOAD MODEL? if you can see the gauges in the 2d panel It may be this
In the panel.cfg
below window 5
[edit]
[VCockpit01]
size_mm=512,512
pixel_size=512,512
texture=$777_1
background_color=0,0,0
gauge00=Boeing777-300!PFD, 0, 222, 255, 288
gauge01=Boeing777-300!MFD, 256, 222, 255, 288
gauge02=Boeing777-300!Autopilot, 0, 0, 512, 58
gauge03=Boeing777-300!Clock, 1, 96, 122, 125
gauge04=Boeing777-300!Backup_Attitude, 256, 94, 125, 125
gauge05=Boeing777-300!Backup_Airspeed, 128, 94, 125, 125
gauge06=Boeing777-300!Backup_Altimeter, 384, 94, 125, 125
gauge07=Boeing777-300!Aileron_Trim_Ind, 0, 59, 81, 34
gauge08=Boeing777-300!Rudder_Trim_Ind, 83, 59, 81, 34
gauge09=Boeing777-300!Autostart, 166, 59, 30, 34
[VCockpit02]
size_mm=256,256
pixel_size=256,256
texture=$777_2
background_color=0,0,0
gauge00=Boeing777-300!Comm 1, 0, 0, 127, 54
gauge01=Boeing777-300!Comm 2, 0, 54, 127, 54
gauge02=Boeing777-300!Nav 1, 0, 108, 127, 54
gauge03=Boeing777-300!Nav 2, 0, 162, 127, 54
gauge04=Boeing777-300!Transponder, 129, 0, 127, 49
gauge05=Boeing777-300!ADF, 129, 49, 127, 54
gauge06=Boeing777-300!Audio, 0, 216, 125, 26
gauge07=Magnetic_Compass!Magnetic-Compass, 172, 103, 84, 82
gauge08=Boeing777-300!Pitch_Trim_Ind, 128, 103, 44, 152
gauge09=Boeing777-300!Beacon_Nav_Light_Switch, 173, 187, 83, 50
[/edit]
Paste the Boeing777-300.gau inside the panel folder.
There is no corrupt file or anything like that I test both models ,I know what Im talking about Buddy, I used to be a modeler,those planes below in my avatar were made by me,so try what Im telling you ,Im trying to help you buddy..

Alex