Forms

[question?]

Hey, i want a form to submit the username in a hidden feild:

<font face='arial' size=2><b>All fields marked with a * are required:<br>
<form enctype='multipart/form-data' action='REMOVED' method='post'>
<table border=1 bordercolor='#000000'>
<table width='50%' border=0>
<tr><td> Name<font color='#ff0000'>*</font></td>
<td>
<input type="text" name="Name" size="20"></td></tr>
<tr><td> Comments<font color='#ff0000'>*</font></td>
<td>
<textarea name='Comments' rows=4 cols=31></textarea></td></tr>
<input type="hidden" name="forumname" value="$vbulletin->userinfo[username]">
</table>
</td></tr></table>
<input type='submit' value='Submit Form'> <input type=reset value='Clear Form'></form>

Doesn't work. Any ideas?