I need help! I have a Bukkit server, and I want to use specific per-permissions warp system. I set the "Per-warp permissions" option true in the essentials config, and my nodes look like this:

(Using PEX)
groups:
example_group1
permissions:
- essentials.warp.[example_warp1]
- essentials.warp
- essentials.list.warps
- essentials.list.warps
- etc.ex_perm1
etc..

It doesn't work, and when I try to list the warps, it doesn't list anything!
Someone please help and tell me how to fix this!