I was trying to switch receptacles in my house from beige to white. Some of my receptacles are connected to a switch on the wall to activate 1/2 of the receptacle (for a lamp). I did notice the red wire, as well as the usual white, black and ground. I placed the wires on the new receptacle just as the old one was placed, however, now the switch does not turn on the lamp plugged into that receptacle. Any ideas?