How to block warps for groups

How can I block a certain group from using certain warps? Im using the essentialsTP plugin I want players with the group A to only be able to use warp A and players with group B to use warp B

 

don't give them permission to that warp

 

How though I typed the permission node with the warp name and they could still warp

 

use pureperms this plugins

edit like

permissions:
- essentials.sign.use.warp
- essentials.warp.use
- essentials.warps.A