iPhoto 09..."repair library's permissions"

Someone please help me. I'm not a computer guru, and I am so lost. I was using the original iPhoto program that came on my computer in 2005, I then upgraded to the iPhoto 09, and since loading it when I try to load pictures from my camera it tells me that "iPhoto cannot import your photos to this library because iPhoto cannot access the library. Please repair your iPhoto library's permissions." I have checked the permissions and everything looks like it supposed to, according to everything I've read. Can someone please guide me in the right direction to fix this problem?! Thank you so much.

Jennifer