Can't solve the Media Pending problem :(

Hi everyone!

I just upgraded to Premiere Pro CC 15.0. I tried opening a project which I had started in a previous version of the software. Now, I believe I changed the location of the new project (put it in a different location from the older one) and now I am stuck with the "media pending" problem.

The clips are playing fine in the source but not in the program monitor. What should I do? When the project was converted I didn't really get a locate clips dialogue box. So I am not sure what really is the problem.

Thanks for the help in advance!