Can't open a garage band song in logic express trial

Question

I've been thinking about getting logic express, but I wanted to try the trail version first. When I try to open any of my garageband songs in logic it says, "Damaged Song or not a logic express song! Damaged songs might create problems and crashes!" After that box it says, "Rad Error! This is not a Logic Express song!" I would appreciate any advice on how I might fix this problem.

Answer 1

I'm not using a different user account than previously, and haven't moved anything. That said, I was able to solve the problem. Here's what I did:
1. Right-click and select GET INFO
2. In the INFO window, open the SHARING & PERMISSIONS panel at the bottom
3. In the lower right corner, click the LOCK to change it to UNLOCKED
4. In the pop-up PASSWORD window, enter your MAC password. The LOCK changes to UNLOCKED.
5. Click the PLUS SIGN lower left, choose the appropriate Person or User/Group (me) and click SELECT
6. The name gets added to the bottom of the GET INFO window, but with “Read only” permission
7. Click the “Read Only” selection and change to “Read & Write”
PARTIAL SUCCESS:  The PROHIBIT badge is gone from the file, and instead of showing ZERO bytes, it now shows XXMB — for example, 32MB.
HOWEVER, when I tried to open the file, I got the message, “Your file has no content”.
TOTAL SUCCESS:  I discovered that I had to go back a level, click on the FOLDER that contained my prohibited songs, and follow the same instructions 1-7 above. Now, at last, I can access my files in the new GarageBand!
Thanks to Hang Time and Leonie for responding so quickly to my plea for help!