We have newly installed a neoangle shower, which included a 'no caulk drain'. But the drain is leaking from between the black drain pipe and the white drain. We installed the drain according to the directions exactly. My questions are:
1 should I use caulking?
2 what kind of caulking? (silicone or silicone latex hybrid)
3 where to put caulking?

I read some posts and it says to put some of the parts in a different order than the instructions? Do I need to do this too? Please help, diagrams appreciated. Thanks!