I have an HP LaserJet P2055dn on my network print server. We have had many an issue with this thing, but I think we've gotten it ironed out except for one last little thing. Every time you want to use the manual feeder for say, an envelope, you have to push the button after you feed the paper to get it to print. None of our other printers on the network require you to push the button to feed the paper? Am I missing a setting somewhere on this?