Problems opening iPhoto pics in PSE 4

Hi,

Today I attempted to simultaneously open multiple iPhoto pics from within Photoshop Elements 4. After hitting Command-O, the dialogue box within which you select which photos you want to open from the hard drive appeared as normal. I navigated to the "Photos" icon on the left menu, which brought up iPhoto and its pictures. As soon as I opened the iPhoto Event whose pics I wanted to work on in PSE, and started selecting photos, the photos disappeared from the dialogue box, along with most of the folder names in the iPhoto folder hierarchy displayed in the upper portion of the dialogue box. A few seconds later, PSE crashed... This happened a number of times. Any suggestions to rectify this would be greatly appreciated!

Thank you,

Maine