Propack apple loops

Hi, I'm having a problem installing my propack apple loops. I put them in the folder Library > Audio > Apple Loops > Apple, alongside my Apple Loops for Garage band, then drag them onto the loop browser, and everything is fine, until next time I load logic, none of the loops are there, and there are no index files. Can anyone help? Thanks, Leo

Do I need the original DVD with the files on? Does this contain the index files? Surely the mac should be able to just reindex everything once its dragged onto the loop browser?