no print as user, OK as administrator

Have two printers (Brother MFC-8220 and Konica Minolta 2300 DL), both USB to
HP notebook (Vista Home Premium), with similar problem. Work fine as
administrator but the Brother prints a blank sheet (Konica gets no response)
when trying as a user. HP, Brother, and Konica can not figure it out. Older
printers (like Brother 5100 and others have no problem from user side).
Thanks for your help (I need a printer)!
--
Don Jessup
President
Pi Pharma, Inc.