xsane works for root but not for normal users

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http://crunchbanglinux.org – This crunchbang system recognized my Brother MFC-8690DW Multi-Function (printer, scanner, copier, fax).So I installed the recommended printer driver and the printer started working immediately.For the scanner, the following was recommened for this 32-bit system:http://www.brother.com/cgi-bin/agreemen … nglish_lprAfter installing this deb package as root, I ran xsane as root and it worked.But xsane would not work when I logged in as a normal user.This confirms it:http://welcome.solutions.brother.com/bs … _scn2.htmlAccording to:http://welcome.solutions.brother.com/bs … q_scn.html& (HowTos)