Did you get an error when you ran that command. One way or another something did happen, either a new blank command prompt, or an error. That command should indeed set it back to what it should be, if it doesn't... well the first thing that comes to mind is that perhaps your normal utilities have been replace (root hack), and you either can't do that, or your directory listing program is not showing what is really there. Another possibility is that there are some other major problems going on, and perhaps the drive is now read only. Check your dmesg output for errors (unless you are on a VPS)
I am a VPS, i ran the command and a new blank line came up after, when I checked it in Kloxo it looked like it hadent changed ! is there a command i can run to see what permisons are on the files and folders ?
At the shell prompt, you can do a simple "ls -la /tmp" and that should show you exactly what the permissions are. In that output it would normally be the first directory "." that you should look at the permissions.