When I use the classic rocket launcher and time bomb, it kills me, could someone help?

Whenever I use the classic rocket launcher and time bomb from the free assets, it kills me when I get too close to the explosion instead of doing no damage to me like in other games that use the rocket launcher and time bomb. I don't know how to script that well so if anyone sees this please help me.

Nevermind, I found out that the classic rocket launcher and time bomb is outdated.