Logitech Wingman Force GP isues GP4

After several years I'm getting some time to play with GP4 again.
Now wordking under Windows 7 I can't get my Logitech Wingman Force GP to work in GP4.
It wordks fine in F1 2011, but in GP4 I have no trottle.
Calibrating in GP4 and in the profiler wordks fine, but when I'm on the track I can's accelerate.
Steering is fine.
Does somebody know how to solve this ?

Regards Rob,

In profiler put pedals as combined, in game create a custom wheel and calibrate it. Should be ok.

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Yessss,

It works !!

Thank you very much Eric !!

Regards Rob,