HELP!

I took out my resonator. Didnt like the noise that it made without the resonator in there. Now that I put it back in, the screws dont fit in it at all. So thats obviously a BIG problem because it rattles now. (the resonator against the part it mounts into)

What should I do!? I need a way to secure the resonator down.

Help guys! Glue hasnt worked, neither has silicone. Please help!