help with offhand procedure

ok so im trying to make a mod that adds different rings that grant effects when held in the offhand. basically, regen ring grants regen in offhand or water breathing ring grants water breathing in offhand. i only have one ring made but the code isnt giving my player regen. ive made a sword thats pretty much the exact same but with the "item in main hand" block and it works. it just seems like the "item in off-hand" block isnt working. any clue how to fix this? heres my procedure btw 

https://drive.google.com/file/d/1myastpROkcQALgQdSaBdr_SIorBB0GdB/view?…