IMovie '11 V9.0.8 Audio Problems after updating 'imported' project

Ok, here’s an interesting question.

My Mac has recently received a new hard drive. I used Time Machine to re-configure my entire laptop. Worked perfectly.

Except my last Time Machine update was before I did a lot of editing in one of my Imovie project. Fortunetly I realized this in time so I just copied that specific project folder into my Dropbox. After Time Machine had re-arranged my laptop I just copied the Project map from my Dropbox back to my new Hard-drive and so did an overwrite on the original copy placed there by Time Machine. Still worked perfectly.

I was so glad it still worked I uploaded it to Youtube to show some of my friend a little preview of the movie. Worked OK still.

Then I decided to continue my editing and I received a warning that I was about to change a finalized project, which was fine because in reality it wasn’t really finalized.

So, I added a song and suddenly I lost all my imported audio files. I mean, they all show little yellow exclamation marks (did so before adding the new song, but since everything worked OK I didn't really mention them) and show this ‘loading’ sign, but they never really load. It’s stuck.. I guess on trying to find the audio files, but it seemed to have no trouble with it before I imported another audio song.

I’m using IMovie 11 v.9.0.8

I've decided to add a screenshot so you can see a bit of what I am seeing, pay attention to the 'loading signs' on the added audio.

http://dl.dropbox.com/u/25973280/Schermafbeelding%202012-11-26%20om%2007.53.30.p ng

Please help, thnx!!