Style Comments

Hi,

I want to style my comment page

As you can see I want to have an arrow on the left side. I tried a lot of different ways, but i cannot figure it out. This is the closest I came, but i still have the border of the div at the bottom and the top.

Can somebody give me the golden tip?

this is the css

.comment-text
{
	padding: 10px 10px 10px 28px;
	background-image: url(images/arrow_comment1.png);
	float: right;
	background-color: #EFEEF0;
	width: 70%;
	border-top: 1px solid #E4E3E4;
	border-right: 1px solid #E4E3E4;
	border-bottom: 1px solid #E4E3E4;
	background-repeat: no-repeat;
}