This sounds like a FingerPrint problem or a Windows firewall / anti-virus / security setting. Ask their developers for assistance. You do not have to buy anything for the iPad.
OS devices can only print directly to AirPrint printers. To print directly from an iPad / iPhone you will need an AirPrint compatible printer or another device to act as a print server. That can be a Mac computer running Printopia ($19.95 with free trial) or handyPrint (donation - supported). The Mac must be "on" but may be asleep for them to work. Equivalent PC options may exist but you're on your own finding them.
You can also buy this standalone print server:
These options enable you to use any printer available to your Mac, even older ones that may predate AirPrint by decades.
Otherwise you will need to buy an AirPrint printer or multifunction device.
Ok,I sort of figured I had to buy a compatibile printer, I only wished the woman who sold me airport express would have told me this from the begining. She told me it would work on any printer so I bought the B1160w. I will now buy the 1260 by dell which is compatibile. If I do this do still need to plug mac into airport? Do I still have to purchase fingerprint? Can I airprint with out installing any or purchasinag any other applications? I do not want to turn on a computer so I can print from Ipad? Thank you for your response. Much appreciated.
Be sure it is the Dell B1260dn - one tiny letter out of place often means the difference between AirPrint compatibility and not.
If the printer is AirPrint compatible you will not need FingerPrint or anything else. Your computers can remain powered down. Only the printer, the iPad, and your AirPort Express must be operating.
The printer will automatically appear in any iOS app that prints.