Alias' not working properly

Hi All

I have a 250GB firewire drive attached to my iMac, it has all my movies, music and pictures on there.

I stream all my media to a Buffalo Link Theatre [http://www.buffalotech.com/products/product-detail.php?productid=96&categoryid=18].

The Buffalo can read data that is stored in my 'home' folder, so I have created alias' of all my media and put them in my home folder.

Last week I had no problems, but since unplugging my FW drive, somehow my alias' don't seem to work properply. I can access them on my computer but my Buffalo won't recognise them.

Any ideas what could have happened? I've tried repairing permissions.

Thanks a lot.