What's pushing this list item down?

[tdrsam]

I have a list with six items and the third one is not in the place it should be.

Here's the html:

<ul>
<!--1-->
<a href="">
 <li><img class="hp_img" src="images/homepage/W12.png" width="145" height="182" alt="W12 2 in 1 tablet">
  <p class="hp_ad_txt">W12 2-in-1 Tablet<br />-------<br />12" Screen</p>
 </li>
</a>

<!--2-->
<a href="">
 <li><img class="hp_img" src="images/homepage/4U.jpg" width="145" height="182" alt="Dream Micro 4U Server">
  <p class="hp_ad_txt">Dream<br />Micro 4U Server<br />--------<br />Full Scalability</p>
 </li>
</a>

<!--3-->
<a href="">
 <li><img class="hp_img" src="images/homepage/H81.jpg" width="180" height="132" alt="Dream Vision H81 All In One PC" style="padding-top:20px;">
<p class="hp_ad_txt">Dream Vision H81<br />-------<br />All In One PC</p>
 </li>
</a>

<br />

<!--4-->
<a href="">
 <li><img class="hp_img" src="images/homepage/MINI_PC.jpg" width="180" height="132" alt="Dream Vision Mini P C" style="padding-top:20px;">
 <p class="hp_ad_txt" style="margin-top:20px">Dream Vision <br />-------<br />Mini Pc</p>
 </li>
</a>

<!--5-->
<a href="">
 <li><img class="hp_img" src="images/homepage/P77.jpg" width="180" height="132" alt="Dream Book Laptops" style="padding-top:20px;">
  <p class="hp_ad_txt" style="margin-top:30px">Dream Book<br />-------<br />Laptops</p>
 </li>
</a>

<!--6-->
<a href="">
 <li><img class="hp_img" src="images/homepage/5018D.jpg" width="180" height="132" alt="5018D Server" style="padding-top:20px;">
  <p class="hp_ad_txt" style="margin-top:10px">5018D Server<br />-------<br />Starting at $1249</p>
 </li>
</a>
</ul>

And the css:

.col2 ul{
	display:block;
	list-style:none;
	margin:0;padding:0;
	text-align:center;
}
.col2 ul a li{
	display:inline-block;
	width:305px;
	height:212px;
	margin:0 auto;
	background-image:url('images/homepage/border.png');
	background-repeat:no-repeat;
	padding-top:5%;
	color:green;
	position:relative;
}
.hp_img{
	margin:-45px 100px 0 0;
}
.hp_ad_txt{
	position:absolute;
	top:5%;left:45%;
	text-align:center;
}

[tdrsam]

Nevermind. It was the height of the image that was causing the problem, so I just edited the image and the problem is fixed.