Admin How To?

[Indexu]

I have a Youtube plater addon witch only Admin can use, It's my own server and i've tried rewritting the user.txt file and did't help what to do?

[Joshua Raphael]

[url=http://wiki.garrysmod.com/?title=Player_Groups]Groups[/url]

and

[url=http://wiki.garrysmod.com/?title=Admin]Admin[/url]