that could be because of a few things. your normal map is applied wrong. youo need to plug it in the cameral normal. i havent use the js_normmap node, but your video card is problebly the problem. since u have an alienware, im going to guess u are using a geForce. if you are, in order to view the normal maps, you need to use a realtime shader from nvdia to be able to view it in maya.