How to make my chat div's appear below each other - php

Question

I am making a small chat and I am having issues making the div's appear below each other. This is what I have:
$i = 0;
while($i < 5)
{
echo "<div class='MyChatholders'>";
echo "<div class='pro_pic'>";
//my image
echo "</div>";
echo "<div class='ChatInfo'>";
//my information
echo "</div>";
echo "</div>";
echo "<br />";
$i++;
}
MY CSS:
div.MyChatholders
{
left: 5px;
color: black;
width: 290px;
height: 100px;
border-radius: 10px;
}
div.pro_pic
{
left: 5px;
width: 30px;
height: 30px;
border: solid black 1px;
}
div.ChatInfo
{
color: black;
font-size: 14px;
left: 40px;
width: 245px;
}
Please note that the (while function) is just to simulate the information drawn from the DBase.
Now my issues is that all the div's are in one position. I would like them to fall below each other. I do not understand why this is happening. Can someone help me with my code and explain why?
I have looked at this solution but it is not working for me Check here

Answer 1

Add position:relative; to your divs.
Working fiddle based on your code: http://jsfiddle.net/MmGyU/1/
Note: Borders in the fiddle are for demonstration purposes.
div.MyChatholders {
position: relative;
left: 5px;
color: black;
width: 290px;
height: 100px;
border-radius: 10px;
}
div.pro_pic {
position:relative;
left: 5px;
width: 30px;
height: 30px;
}
div.ChatInfo {
position:relative;
color: black;
font-size: 14px;
left: 40px;
width: 245px;
}

Answer 2

Make it print your <div> tags to a new line in your loop using \n
$i = 0;
while($i < 5)
{
echo "<div class='MyChatholders'>\n";
echo "<div class='pro_pic'>\n";
//my image
echo "</div>\n";
echo "<div class='ChatInfo'>\n";
//my information
echo "</div>\n";
echo "</div>\n";
echo "<br />\n";
$i++;
}
EDIT Syntax was wrong, the \n needs to be within quotes
2nd EDIT My mistake, \n is not HTML and it won't work. You could use <br /> instead according to this post

Answer 3

Add clear:both; to your chat divs.