I just bought a Thule Freeway 968 bike rack. According to their website it should fit the 2007 Prius hatchback. When I try to mount it on my Prius, I find that the straps are too short. I'm supposed to stretch them from the top of my hatch and back to the rack, but appearently that's more than 120 cm. Anyone else got this rack who can help me? I'd really appreciate it!