This isn't what you want to hear, however, it appears your printer is not supported in linux.
LinuxPrinting.org is pretty much the authority when it comes to printing.
See this link -->
http://www.openprinting.org/printer/Dell/Dell-AIO_922
Only other possibility it to check out Dell's web site. Most Dell printers are Lexmark printers re-branded, and Lexmark printers are poorly supported at best.
If you decide to look for another printer, look at LinuxPrinting.org first. Brands that are well supported are Brother, HP, and Epsom.
