Tim Robson
What is the media? It may be that you have a file type not supported by AV Foundation (which we use to extract the Audio). If those paths ending .RDC are the files then this may be the case, if those are paths to where the media is then it may be a permissions problem in those folders.
If the files are not supported then you may need to import the files as proxies in FCPX and link the project to the proxy media (use something common as a format).
Tim.