HP LaserJet M1522 scanner problem

Problem: When multiple pages are scanned, it comes out with vertical lines

First page scanned is ok but others are scrambled.

Solution is here:

http://forums13.itrc.hp.com/service/forums/bizsupport/questionanswer.do?admit=109447627+1248346661485+28353475&threadId=1291928

hpiscn.dll should be copied here:

c:\Program files\HP\Digital Imaging\bin\

even though that file exists with same size and date!

Reinstaling, firmware update didn't help. Only this replacement did.