I have dl and installed the patch from the HP site to enable the copy utility with USB, but when I push the button, I still get the message that the scanner is not connected (error messages 1214 and 1215). Have any ideas whey this is happening and how to overcome it? In general it seems as if sometime the computer loses connection with the scanner via USB. When I unplug the USB and then plug it back in, the connection is found again. Why?