Sideboxes with different colours?

[DivaVocals]

Okay I don't mean to be a dummy about this, but I can't figure out how to make this work... What am I doing wrong here???

http://divawebdzine.com/clients/TreeLifePublishing/

I used the blank sidebox contribution. I want this new sidebox to have no background. I am getting nowhere fast..

Here's the relevant portion of my CSS: what did I do wrong:

/*sideboxes*/
.columnLeft {}

h3.leftBoxHeading, h3.leftBoxHeading a, h3.leftBoxHeading label, h3.rightBoxHeading, h3.rightBoxHeading a, h3.rightBoxHeading label {
	font-size: 1.1em;
	color: #ffffff;
	}

h3.leftBoxHeading a:hover, h3.rightBoxHeading a:hover {
	color: #005279;
	text-decoration: none;
	}

.leftBoxHeading, .rightBoxHeading {
	margin: 0em;
	background-image:url(../images/box000.gif);
	background-repeat: no-repeat;
	padding: 20px;
	}

.centerBoxHeading {
	font-size: 12px;
	background-image:url(../images/bar.gif);
	background-repeat: repeat-x;
	padding-top: 7px;
	padding-bottom: 13px;
	}

.leftBoxContainer, .rightBoxContainer {
	background-image:url(../images/box001.gif);
	background-repeat: repeat-y;
	margin-top: 0px;
	}

.sideBoxContent {
	background-image:url(../images/box002.gif);
	background-repeat: no-repeat;
	font-size: 11px;
	line-height: 125%;
	background-position:bottom;
	padding-top: 5px;
	padding-left: 20px;
	padding-right: 20px;
	padding-bottom: 25px;
	}

.contentSideBox {
	font-size: 11px;
	line-height: 125%;
	padding-top: 5px;
	padding-left: 20px;
	padding-right: 20px;
	padding-bottom: 25px;
	}

#contentboxsidebox{
	margin-top: 0px;
	}

.centeredContent, TH, #cartEmptyText, #cartBoxGVButton, #navCatTabsWrapper, #navEZPageNextPrev, #bannerOne, #bannerTwo,  #bannerThree,  #bannerFour,  #bannerFive,  #bannerSix, #siteinfoLegal, #siteinfoCredits, #siteinfoStatus, #siteinfoIP, .center, .cartRemoveItemDisplay, .cartQuantityUpdate, .cartQuantity, .cartTotalsDisplay, #cartBoxGVBalance, .leftBoxHeading, .centerBoxHeading, .rightBoxHeading, .productListing-data, .accountQuantityDisplay, .ratingRow, LABEL#textAreaReviews, #productMainImage, #reviewsInfoDefaultProductImage, #productReviewsDefaultProductImage, #reviewWriteMainImage, .centerBoxContents, .specialsListBoxContents, .categoryListBoxContents, .additionalImages, .centerBoxContentsSpecials, .centerBoxContentsAlsoPurch, .centerBoxContentsFeatured, .centerBoxContentsNew, .gvBal, .attribImg {
	font-size: 11px;
	text-align: center;
	}

h3.leftBoxContainer, #whatsnewHeading, #searchHeading, #recordcompaniesHeading, #searchContent, #featuredContent, #specialsHeading, #manufacturersHeading, #reviewsHeading, #featuredHeading, #musicgenresHeading, #currenciesHeading, #shoppingcartHeading {
	font-size: 11px;
	text-align: center;
	}

.productListing-rowheading {
	font-size: 12px;
	background-image: url(../images/bar.gif);
	background-repeat: repeat-x;
	height: 30px;
	}

#bestsellers .wrapper {
	margin: 0em 0em 0em 1.5em;
	}

#bestsellers ol {
	padding: 0;
	margin-left: 1.1em;
	}

#bestsellers li {
	padding: 0;
	margin: 0.3em 0em 0.3em 0em;
	}

#bannerboxHeading {
	background-color: #0000CC;
	}

#upProductsHeading {
	text-align: left;
	}

#upDateHeading {
	text-align: right;
	}