can't send PM's

I'm getting this message each time i try to send a PM...
 
XmlHttpPanel loading error:
Exception=There was an error in the callback.72|/wEWBQLCneWiCgKW5qfDAQKm+fnYAgL4/L3aDgLD9MiTAfoTiStxeXEhTcRKanXNZRs1VGK6

<div class="small_wrapper">
<div><div class="nxtprv"></div>
<h3 class="message_title">

</h3>
<div class="forum_wrapper">


</div></div></div><div class="yPadding10"></div>
<script type="text/javascript">

registerJQSelectable(true);
</script>
 
 
I have restarted the computer, but it still says no.