Gmod help Luapad installation!

I need help on trying to get luapad to work from the console on gmod. I have it here right now with no luck C:/program files (x86)/steam/steamapps/account/garrysmod/garrymod/addons. Its wont work for some reason please help!

Did you restart GMod?

[editline]31st July 2012[/editline]

If you did, type ‘luapad’ in console without the quotes.

I did but still nothing. Idk why it wouldn’t start. If you know how to fix or anyone who does please either reply to help me further or please send someone who does thank you for the reply.