How to fix IE7 float-clear combination - css

Question

I have a field_wrapper class div which contains the 3 sub divs field_label, field_input and field_error
I need to put the field_label, field_input side by side and field_error below the first two.
Please see below css code to know how i achieved this, My problem is Its is not working in IE7. clear both applied to the field_error is not working.
Even after googling for a long time i can't find a proper method to fix this without adding the HTML mark-up. Please advice css tip or any other method to avoid extra markup code
.field_wrapper
{
clear:both;
}
.field_label
{
float:left;
width:40%;
}
.field_input
{
float:left;
width:40%;
}
.field_error
{
clear: both;
color:#FF0000;
float: right;
text-align:left;
width: 60%;
}
<form method="post" action="http://localhost/locations/add">
<div class="field_wrapper">
<div class="field_label">
<label for="location_add_name">Name</label>
</div>
<div class="field_input">
<input type="text" id="location_add_name" value="" name="name">
</div>
<div class="field_error">
<p>The Name field is required.</p>
</div>
</div>
<div class="field_wrapper">
<div class="field_label">
Address
</div>
<div class="field_input">
<textarea id="location_add_address" rows="12" cols="90" name="address"></textarea>
</div>
<div class="field_error">
</div>
</div>
<div class="form_submit">
<input type="submit" value="Add" name="submit">
</div>
</form>

Answer 1

If you do not want to remove the float left. You can use this wrapper code
.field_wrapper { display: inline-block; }
.field_wrapper:after { content: "."; display: block; height: 0; clear: both; visibility: hidden; }
* html .field_wrapper { height: 1%; }
.field_wrapper{ display: block; }
It works for me every time (IE6 as well)
Update:
I looked at this again, and changed the markup a bit, also made it valid xhtml.
Just put the class on the P tag, you dont need an extra div.
.field_wrapper
{
clear:both;
}
.field_label
{
float:left;
width:40%;
}
.field_input
{
float:left;
width:40%;
}
.field_error
{
clear: both;
color:#f00;
width: 60%;
}
<form method="post" action="http://localhost/locations/add">
<div class="field_wrapper">
<div class="field_label">
<label for="location_add_name">Name</label>
</div>
<div class="field_input">
<input type="text" id="location_add_name" value="" name="name" />
<p class="field_error">The Name field is required.</p>
</div>
</div>
<div class="field_wrapper">
<div class="field_label">Address</div>
<div class="field_input">
<textarea id="location_add_address" rows="12" cols="90" name="address"></textarea>
</div>
</div>
<div class="form_submit">
<input type="submit" value="Add" name="submit" />
</div>
</form>

Answer 2

Remove float:right from 'field_error'

Answer 3

let me tell you one thing first. if you having floating content in a container the container never contain it untill and unless you set the container overflow property to hidden or also make it float you. like
.field_wrapper
{
clear:both;
overflow:hidden;
}
Now it contain all floating element. Now for your error div as you are floating you elements to left, so make clear:left only and it will work.
Thanks