Hi jyh10001!
Thank you for reaching out to Canon USA, we're happy to help!
If you've installed the most up-to-date software and drivers for your computer's operating system from the Canon USA website (HERE), and you're still having problems, we'd recommend reaching out to our US-based technical support team for troubleshooting. They're avaible by phone at 1-800-OK-CANON (800-652-2666) Monday-Friday 8:00 am to 8:00 pm ET, excluding holidays, or anytime by email at http://Canon.us/EmailCF
We hope this helps point you in the right direction!