Laptop S-Video TV on Intel 915GM

[justinone]

Hi, while connecting to my LCD TV with my laptop i encounter problems. I connected the tv and the laptop successfully using the S-Video cable and it shows on my Intel 915GM. however when select and apply a tv mode e.g dual display, the screen refreshes and brings me back to desktop but it returns with nothing selected and nothing appears on the tv. i try all the options listed but all do the same. anyone know how i can get my laptop on tv?