Looks like you fried your graphics card.
Don't worry though you're not alone, look here:
https://bitcointalk.org/index.php?topic=101624.220Every page there shows at least 10+ people who have fried their graphics card as well. Mining is a risky business, if you don't go in prepared, be prepared to lose.
You should be cautious when trying out people's settings, you should always make sure that they have the same graphics card type as you do and that theirs isn't overclocked or watercooled or some other modification.
I look here for all the hardware settings I set my GPU to:
https://litecoin.info/Mining_hardware_comparison