KYB instillation problem, can't get new inserts in Options

[ScoobyDooCruiser]

Hey,

I was trying to get my new kyb inserts installed last night. I was trying to get the front ones in. I was able to get the entire assembly out, and was able to pull the old shocks out. When I put the new kybs in, the ring that goes over the top which secures the insert into the assembly won't screw back down. The ring is about 1/2 inch to high to fit back in. Is there another piece I need? Is there something I'm missing? I checked at the bottom of the assembly, and I don't see anything more that comes out. Any ideas? Help!