Comment Box Issues, ...help Options

[LifesLushLips]

I made a DIV overlay for my Createblog profile for the first time today but I'm having a little trouble with the comment box.

Whenever someone tries to comment it says "Missing Comment Body" but I don't know why.
I made a tester account and tried the layout out there and it worked fine but when I put the code in my personal profile it doesn't work.

CODE

<style>
textarea{width: 275px; background-image: url(""); background-repeat:repeat; background-color: #363636; border-width: 1px; border-color: #ffffff; font-weight:normal; color: #ffffff;}

input{background-image: url(""); background-color: #363636; border-width: 1px; border-color: #ffffff; font-family:small fonts; font-size: 8px!important; font-weight:normal; color: #ffffff!important; letter-spacing: 3pt; text-transform:uppercase; width:275px;}
</style>

<div><form action="comment.php" method="POST">
<textarea name="comment" cols="15" rows="3" class="cmnt">How about a comment?</textarea><br>
<input type="submit" value="Comment" class="button" />
</div>

That's the code I'm using. Can someone please tell me what's wrong?