Hi! Does anyone know how to rewire a phone jack? It's in my den but it's a different line/number than the one I use in the rest of the house. I want to put my computer/DSL/fax/answering machine in that room without running an extension phone cord across the floor and down the hallway. The phone company said all I have to do is switch the red and blue wires; but I still didn't get a dial tone. THANKS!