Duplexing using HP LaserJet P1102w

I'm unable to print in duplex mode wireless without lifting the lid of my printer...simulating the "RESUME" function on my network using an airport express. I downloaded the latest HP driver V3.0.

USB connection works fine and i'm able to duplex any documents. Also, using my PC desktop I can print duplex using my network with no problem.

Any solution?

Andre, Montreal