You've lost me.
Only thing I can guess is *maybe* you're trying to connect two ethernet devices over a single ethernet cable. It's best just to use switches, but they do make adapters, one you place on each end, that allow TWO ethernet devices to share a single ethernet cable. Not something I recommend, not something I can imagine using myself, but they do exist.http://www.amazon.com/gp/product/B00288Z0Q6/
(note, MUST be used in pairs)
Otherwise, if I'm way off base, nevermind.