First make sure the firmware is up to date (i would even flash the latest if you have it) search the forum for force firmware.
Then I would set the unit back to factory defaults from the web interface under maintenance.
Thanks Paul.
I successfully forced the firmware update, I also reset the factory defaults as you suggested. Unfortunately it had absolutely no effect on the problem. The LinkStation is visible from the LinkTheater but I can't see any shares or files, frustrating! Thanks for trying though.