Logic Masters Forum

i am brand new to the puzzle world other than doing them in my spare time , but i have had an idea for a sudoku puzzle constraint for a while and decided to give it a go , however i cant seem to get it to work on sudoku maker i could really use some help figuring out what i am doing wrong 

thank you ,
Moore

I made my constraint by hand and made a puzzle on the logic masters sudoku page if anyone is interested please give it a go this is my first attempt at setting and would love some feedback