Need help Creating Custom Image Styled Lists in WordPress Pages

Hello, if anyone could tell me what I’m doing wrong regarding trying to change the style of my lists, I would appreciate it.
I’m trying to use an image for my bullets but cannot get it to show.

Where should i change the code to affect all bullets and what should I insert? I tried “li {
list-style-image: url(‘image.ext’);” but did not work and I wasnt sure exactly where to put it.
Here is the css stylesheet.

/* Begin Lists*/
html>body .entry ul {margin-left: 0px;padding: 0 0 0 30px;list-style: none;padding-left: 10px;text-indent: -10px;}
html>body .entry li {margin: 7px 0 8px 10px;}
.entry ul li:before{content: “0BB 020”;}
.entry ol {padding: 0 0 0 35px;margin: 0;}
.entry ol li {margin: 0;padding: 0;}
.postmetadata ul, .postmetadata li {display: inline;list-style-type: none;list-style-image: none;}
#sidebar ul, #sidebar ul ol {margin: 0;padding: 0;}
#sidebar ul li {list-style-type: none;list-style-image: none;margin-bottom: 15px;}
#sidebar ul p, #sidebar ul select {margin: 5px 0 8px;}
#sidebar ul ul, #sidebar ul ol {margin: 5px 0 0 10px;}
#sidebar ul ul ul, #sidebar ul ol {margin: 0 0 0 10px;}
ol li, #sidebar ul ol li {list-style: decimal outside;}
#sidebar ul ul li, #sidebar ul ol li {margin: 3px 0 0;padding: 0;}
/* End Entry Lists */