Fitnesse - Unable to select checkbox inside a Grid

Hello everyone,

I have been trying to use different FitNesse scripts for checkbox inside a grid and none of them worked. This are some of the scripts that I tried and failed.

https://community.appian.com/discussions/f/general/11463/fitnesse---not-able-to-select-checkbox

https://community.appian.com/discussions/f/general/9159/fitnesse---populate-check-box-field

https://community.appian.com/discussions/f/general/11191/fitnesse-how-to-select-the-checkbox-inside-grid

 Now what i'm trying to select is "Developer" checkbox from "Available Rules & requirements " list.

I attached the Picture below if you have any suggestion please?