[For 1.6] Extra Forum Permissions

[WINBOY]

This user has been denied support.

here i get problems....
please solve it.
why extra not seen in permission as seen in here in first post.

can any one explain steps of installation properly????
i had done both ways..
1.... upload all folder in plugins

2nd is Uploading extraforumperm folder files in language and extraforumperm.php in plugins..
but not showing option in Extra Permission in forum management but i can see extra in groups permission.

i want to see extra in forum management > forum> permissions> custom permissions>extra (as seen in author first post here)