I'm trying to replace an on-off light switch in bathroom to a combo light switch and plug GFCI. The house was built in the late 40's. The previous owner did his own remodeling and he was not an electrican. I'm wondering what he did when he remodeled his bathroom. There are 2 cables coming into the box that are side-by-side from the back, each cable has 1 black and 1 white wire. The original switch had the 2 black wires connected to it, the white wires were taped together. The new receptacle has 2 silver screws and 2 brass screws on the sides and 2 black wires coming out of the top. On the back of the switch it has "line" on top and "load" on the bottom. I have tried every conceivable configuration and cannot get it to work correctly. I get the light to work but it won't shut off, or I get the plug to work but the light does not turn on or off. I have switched the connections so many times I forget what I have tried. I am beginning to think that the new switch is defective. I am totally confused at this point. Can anyone help me make sense of this? :confused: :confused:

Whenever I use my Shopvac (13 gallons), it gets electrically charged and I get zapped everytime I come to pick it up or move it. I have had this unit for about 10 years and this has started this year. What do I do?