need help with the border of this theme

i downloaded this theme from bloganything.net.
the problem is that i cant remove the grey border in the side. i took it off the header and footer since it was just a n image but how do i get it off the entire page ?

here is d pic of the theme…please do help i am completely new to all this css and php stuff
https://img181.imageshack.us/my.php?image=jacb2zq9.jpg