Indexhibit Support

I have problem of changing navigator background.
so I need some help!

I tried editing style.css
it work about changing background color but It isn't work when I
add background image url.

ex)
/* never adjust the margin or padding here unless you seriously know what you are doing */
/* think #index .container and #exhibit .container for only padding adjustments */
#index { width: 215px; background: #fff; /* line-height: 1.3em; */ }
#exhibit { margin: 0 0 0 215px; }
#index { background: url(*my url image*) no-repeat; }

What can I do for this?
sorry, about my english skill.
thank you.

Have you got a working url so we can see what are doing and what maybe wrong?

snogsong.com this is my url !

snogsong.com/snogsong_image/bg.png is not a url - this is a url: snogsong.com/snogsong_image/… (include the http : / / www. or copy the url address directly from your browser)

thank you!
but it is still not working :(

#index {background: url(snogsong.com/snogsong_image/…) no-repeat; }

my css code is wrong?

1. background: url('image_url_here')

you forgot the ' outside the url.
Use a css validator to check these things: jigsaw.w3.org/css-validator/

oh! thank you!!
It's working!
problem is menu bar width size!

thank you again!