I recently media managed a sequence in FCP 7 and saved it onto an external drive. When I open the sequence, most of my media has gone offline. The offline media is footage that was originally logged and transferred. All archival footage, photographs and graphics remained online. When I attempt to reconnect the offline media, I get a File Attribute Mismatch error (Media Start and End) and cannot reconnect. I'd appreciate any troubleshooting help!