Classic British Flight Sim

I have never before had to use the above on any long flights so have not had any problems with fuel. Just recently I have done a couple of 500mile+ flights. How can one ensure that the fuel panel works correctly. All I see at the moment is the left tanks emptying and the right tanks not. Then the engines stop and that is that with the right tanks full.

Managed to sort it out. To do with your default aircraft at start up of sim