I just bought a 21" monitor in Korea(where I now live) in order to hook it up to my ACER Aspire 5000 laptop, which I purchased in Canada. The connection cord is the same as back home but when I hook the two up together nothing happens, the Monitor says "No Signal" and the display device manager doesn't list an external monitor(but has the ability to use multiple monitors). Any advice, what am I missing here? Thanks.