Fuel And Payload Changing

Hey
I'v got a problem with changing the fuel and payload.
I was screwing around this morning at Miegs field, trying to take-off a 737-400 (which is obviously not possible with full fuel). So i went to the fuel and payload screen and tried to change the fuel loads to 10% per tank. A simple command. All i get every time i try and change fuel and payload is this message "Please enter a number between 0 and (number)" Despite the fact that i already did enter the right number.
Now i thought this was my typing problem, but i tried it for 5 or 6 planes and i tried changing the payload with the same problem.
Anyone else get this?
cheers
forfun
I'v got a problem with changing the fuel and payload.
I was screwing around this morning at Miegs field, trying to take-off a 737-400 (which is obviously not possible with full fuel). So i went to the fuel and payload screen and tried to change the fuel loads to 10% per tank. A simple command. All i get every time i try and change fuel and payload is this message "Please enter a number between 0 and (number)" Despite the fact that i already did enter the right number.
Now i thought this was my typing problem, but i tried it for 5 or 6 planes and i tried changing the payload with the same problem.
Anyone else get this?
cheers
forfun