I bet your empeg will work in either sled, and your riocar will only work in "its sled". As long as this is the case, you need to look at the sled that the riocar won't work in. Either 1) The fuse in the sled's wireing has blown or 2) it's wired wrong, and the constant power isn't even hooked up. Check the FAQ for a better explanation.

Matthew