iPhoto won't kick me into Photoshop anymore

Hi,

What's going on? In iPhoto Preferences: General, I have it set to open photo in an external editor: Adobe PS CS4/ However, when I double-click on the photo (yes, it's set to edit and not magnify) or hit the edit button, nothing happens.

Any ideas? NB: I recently did a Migration Assistant install of PS. Might that be the root of the problem?

TIA!

As I recall, Photoshop won't work if you don't reinstall it from the original disks. It (along with a small handful of other programs) don't like being transferred via Migration Assistant, so yes I think that's the problem.