<form
- action="{!URL!}/modules.php?module=admin&what=lock_user&u_id={!__UID!}"
+ action="{!URL!}/modules.php?module=admin&what=lock_user&uid={!__UID!}"
method="POST">
<table border="0" cellspacing="0" cellpadding="0" width="500"
align="center" class="admin_table dashed">