Cannot connect to Server

I have two first generation Apple TVs that I have been happy using XBMC on. Now all of a sudden neither is allowed to access the hard disk that contains my videos.

I am able to connect to my iMac where the hard drive is connected but for whatever reason the setup to do this on XBMC no longer works. It says:-

Remote Share: Cannot connect to network server

So frustrated :frowning:

Any suggestions?

Had to resort to FTP

this works!! YAY!!

Is this the most effective (and speediest) way to connect to my HD on the iMac or should I use another protocol?