[Operations]

look in your phpmy admin
enter
"SELECT * from template where title like "head_newmsg" LIMIT 0, 30 " if there is the template that all is ok..
if there is none enter new template

templateid  templatesetid  title                       template  
Your id   -             1                head_newmsg   <script language="JavaScript"> alert_box=alert("$bbtitle Messaging\n\n$popmessage\n"); </script>

You have to Create a template called "head_newmsg"

Insert in the template

<script language="JavaScript"> alert_box=alert("$bbtitle  Messaging\n\n$popmessage\n");
</script>

ok?