Slightly better text

mitx_help.html

@@ -4,7 +4,8 @@
   <div>
     <section class="help-email">
       <h2>Help &amp; Feedback</h2>
-      <p> If run into any problems, we have several e-mail addresses set up:</p>
+      <p> If run into problems signing up for the web site which you
+      cannot resolve on your own, you can reach us at:</p>
       <dl>
         <dt>System-related questions</dt>
         <dd><a href="mailto:technical@mitx.mit.edu">technical@mitx.mit.edu</a></dd>