Having trouble restoring library on mac

Hi

Im having trouble restoring my library. Im using a macbook pro with osx 10.9.4 and using rekordbox 3.0.1 I've had to wipe my hard drive on my mac and reinstall osx and rekordbox. Before i did i backed up my library to an ext hard drive. Now I've downloaded an installed rekordbox 3.0.1 again but when I've come t restore my library it gets to 76% an then says 'failed to restore collection' . Any ideas?