help changing my background

[animelovers411]

hello , i had my forum for a long time but i think its time to change the look of it and i need help tho , right now im trying to change the background of my forum , its grey right now and i want it to become a gradient background , like a simple question is how do i change the background image? so i could put my own background image back there , any help can help thank you

so far i changed the width of it im trying to make it have the background look like this forum has

heres the link

http://animelovers411.forumotions.net/index.htm

[Guest]

to change all pictures of your forum go to. ACP - Display - Pics managements - advance mod - there you will find all pictures and the background too.