Lcd Tv Wall Mount 37" LCD TV Wall-mount Installation?

37" LCD TV wall-mount installation? - lcd tv wall mount

I bought a 32 "LCD TV and wall mount 23" -40 "up to 100 pounds. The setup uses 3 large screws into the woods to celebrate. After 3 weeks, I decided to return to the television set and a better 37" . You can expect this new 37 "used TV with 10 pounds more than the wall mount I for 32"? Is it safe? Is it necessary to add more screws in it?