Yes, you will need to make your file smaller, less than 1 mb is ideal for posting anywhere on the internet. As QuiltnNan said, lots of help on how to do that in the Help Center.
http://www.quiltingboard.com/qb-help...g-t166655.html
http://www.quiltingboard.com/qb-help...s-t168819.html
http://www.quiltingboard.com/qb-help...p-t229180.html