Canon scanner leaves the finished scan light grey

I have just tried to do some scans but they all came out a light grey. I have had the scanner, Canon Canoscan Lide 210, about a year& this is the first bit of trouble I had. The scanner's manual said to check the connections & to check if the travel lock was switched to unlock. I checked them & they were all right, I also checked the driver from the CD, & the message I got said I already had a more up to date driver installed. Has anyone come across this problem & can help me out. thanks Mac.