If you are letting in ambient for the background and using flash for the foregound then no WB-present can help you because you have got mixed lighting, the color of the background light and the color of the flash light is different, the flashlight is usually daylight balanced. in order to remedy that you need to put a correction filter on your flash so that it has the same color temperature as the blulbs lighting the background. See this article>
Strobist: Lighting 101: Using Gels to Correct Light