Textarea not POSTing with form

Textarea not POSTing with form

I'm trying to input a textarea tag when I submit my form:
<textarea id="confirmationText" class="text" cols="86" rows ="20"
name="confirmationText" form="confirmationForm"></textarea>
<form action="sendConfirmation.php" name="confirmationForm" method="post">
<input type="submit" value="Email" class="submitButton">
</form>
As you can see I've set the form="confirmationForm" attribute in my
textarea tag. I've used Live HTTP Headers to catch the POST request and it
is empty (so I know the problem is not in sendConfirmation.php, the
problem is that the confirmationText is not being POSTed). I've searched
the net and as far as I can see I've set it correctly.