I can no long print documents from my iMac/Snow Leopard/HP Laserjet 2300dtn combo. because every time I try, a message comes up: ERROR: A Fax number was not provided. There is no mention whatever of 'fax' in the "Print and Fax' file in System Prefs.

I am using a 2011 iMac running Snow Leopard, but can no longer print documents via my hp laserjet 2300dtn printer. Reason: Each time I try, a message comes up via the PRINT icon in the Dock, reading: "ERROR: A Fax number was not provided". There is no fax option in the Print & Fax window in System Prefs so I have no idea re origin of error message, but suspect there's corruption in the Print preferences. So I went username/library/Preferences/com.apple.print.PrintingPrefs plist .. and dragged file to the trash. Alas, the problem remains unresolved. I'm far from computer literate and would appreciate any advice to resolve this situation.