Doors and Engines in FS2004

I'm not sure if this is the right forum to ask this but here goes.I'm having trouble with some of the planes (default and otherwise) in FS2004. Trying to access doors and engines other then number 1 doesn't work. Tried Shift E + 2 but only opens door number 1. Samething with the engines. The engines are worse, if I try to access, say, engine 2, engine 1 is the one that only works. And then I can't get back to all engines after that. Tried E + 1,2,3,4 but nothing but engine 1 unless I reload the aircraft. This is very annoying. Any help? Having the same problem?