I have no idea how to change my personal setting like avatar and signature.

i always get this massage :

M0LT3N, you do not have permission to access this page. This could be due to one of several reasons:

Your user account may not have sufficient privileges to access this page. Are you trying to edit someone else's post, access administrative features or some other privileged system?
If you are trying to post, the administrator may have disabled your account, or it may be awaiting activation.

thanks to anyone willing to help.

You can find everything you need to know here Gamers Forum Rules - Updated 9/19/2010

thanks :) hope it helps.