[Darryl Ramm]

Define not work. Eleven Rack Input and/or output? not working? No signal at all? clicking? drop outs? What are you feeding this with to drive a signal? Have you tried to confirm some other way that the signal is actually there? What do the relevant meters in the Eleven Rack front panel rig display show (scroll to the far right of the rig)?

Short audio cables should work most of the time. Weather your particular cable will, we cannot guess. Start by gettign things set up properly with a correct impedance RCA S/PDIF (or video) cable, ideally one you know/can test works elsewhere.

When things don't work is the Eleven Rack working at all? Test with a guitar and monitors directly connected to the Eleven Rack (don't power cycle, the S/PDIF problem happens... just plug stuff into the ER and test if the guitar works (remember to set the Eleven Rack input to "guitar In")). How old is this ER/where did you get it? What version is the unit? (last letter of serial number on label on back panel).

You can also troubleshoot things by testing what you have with other devices, lie the S/PDIF in on a consumer audio preamp or the S/PDIF out on a computer or MP/3 player etc. driving the interface S/PIF in.

Make sure you have the clock settings correct and the Digital In on the Eleven Rack set correctly.

If you want more help describe your setup in enough detail so we can see what you are doing.