Okay, so we identified the problem... adjusting the tension on a trem is pretty basic... You'll have to remove the trem cover on the back of the guitar so that you can access the springs and the spring claw. There should be either 3, 4, or 5 springs on your trem... my guess is there are 3. One way to do this is to add springs.... I would think that one spring would be sufficient... if they didn't give you the extra springs you can always tighten the trem claw. The trem claw is the part that looks like.... well.... a claw. It should have 2 screws that anchor it to the body and it should be about an inch to an inch and a half away from the body. Screw one screw a couple turns... then screw the other screw a couple turns going back and forth making sure that you are screwing the screws IN... so that the trem claw gets closer to the body. Keep an eye on the bridge and keep doing this until it's satisfactory. HOWEVER! I would suggest going to a guitar store and buying springs... That way... when you change your strings again you can just take a spring off or add a spring.