I just purchased this universal rear bike rack, but some parts aren't long enough for this rack to screw into my road bike. The part that isn't long enough is the top of the rack that fits to the top frame of my bike. Any thoughts on how to make this work?

Thanks!

P.S. here is the link of the rack I purchased

http://www.amazon.com/Ventura-Univer...074048&sr=8-13