It's like this . . . I had a chandelier that is operated by a dimmer downstairs and a switch upstairs. Everything worked as it should until I replaced the chandelier with a new one. It had one black wire and one white wire, just like the first one. So I made the connection and now, the light comes on fine and can be turned on and off at the upstairs switch and at the downstairs dimmer, BUT the dimmer function doesn't work!! It's just off and on. What in the world could cause that and what do I do to fix it???