Envelope printing

Got a 3100CN and had the same problem but found that a) Changing paper size from the web doesn't work
but b)
Go to the printer control panel on the printer and use the menu to set the paper size for the MPF tray for FREE.
Now your application under windows will overide the whatever the printer thinks and will print. Envelope via Word all work without problem.

Suggestion . Configure two printers one B&W using tray one and one colour using MPF and you can now quickly select whether to use colour or b&w.
Regards
John N - N2UYI/G7LTQ

Jerry, are you using Vista? The same thing is happening to me and I used to be able to print, but don't remember if it started happening after I changed o/s

The issue has been resolved. It was not the printer, but the operating system. As was suggested, I hooked the 3100cn up to my old laptop which uses a XP operating system and the envelopes printed properly. A Dell tech walked me through settings adjustments to allow the Vista operating system to work with the 3100cn.

I don't think is going to be particularly helpful, but it seems to be a problem with the printer's MPF tray. I've spent several hours trying to get the thing to work and print to different paper sizes, but it always is a hack to be able to get it to do what I want. I have noticed that if I set the paper in the tray and then go in to the properties dialog in the print menu and go to the "Paper Tray" tab and set the MPF tray to the same settings that it works more often. You also have to set the paper size on the "Paper" tab to what you are expecting. I don't know why Dell's drivers aren't capable of handling all of that more elegantly, but it seems to be a common complaint.