fujitsu s300m problem scanning

We just got back from India after one month holiday and for some reason the scanner has stopped working. It was great before we left and maybe I have forgotten how to use it. WHen I plug it in it has flashing light below the scan button but when I press the scan button nothing happens. WOuld you have any idea of why it has stopped or how to fix it.

HI I actually worked it out—I had deleted the scan snap manager and now have reisntalled and it is working again