HELP: Fuel-Level doesn't show on the 2nd machine!

[rokwell]

I ran FG on 2 computers, 1st use the command line:
fgfs --native-fdm=socket,out,60,,5510,udp

The 2nd use this command line:
fgfs --native-fdm=socket,in,60,,5510,udp --fdm=external

Then I turn on the 2D-Panel on the 2nd machine and the Fuel-quantity doesn't show.

Anyone know how to fix this?

Thanks

[ Flightgear v.2.0.0 OS:Ubuntu 11.04 ]

[rokwell]

Yeah.

I found the mistake myself.

The fuel quantity packet which FG send via the socket is only /consumables/fuel/tank[number]/level-gal_us