iphoto 6 problems

Hi All,

I'm having an issue with iphoto (6) and I have tried all possible solutions (I think) but I cannot fix the problem. After not using iphoto for about a month, I tried to upload some pictures from my digital camera and I received the following message. "An error occurred while trying to save your photo library, some recent changes may be lost. Make sure your hard disk has enough space and that iPhoto is able to access the iPhoto Library folder". I have attempted to move the location of the iPhoto folder, but have been unsuccessful. I have also tried reinstalling iphoto with my Master disks, but this has not helped either. Last but not least, the pictures are now locked and I cannot delete them to try anew.. Any suggestions would be most appreciated.