we are using this session in the menus, if the user has admin rights some menus are shown otherwise not shown. here is the code
<tr><td>
<%if (System.Web.HttpContext.Current.Session["admin"].ToString() == "Y")
{ %>
<li style="width:124px;"><a href="#" style="text-decoration:none;">Add Location</a>
<%}
else if (System.Web.HttpContext.Current.Session["admin"].ToString() == "N")
{ %>
<li style="width:124px;"><a href="#" style="text-decoration:none;"> Location </a>
<%} %>
</td></tr>

And we use the session time out as 540. but why this error message shown .. Thanks in Advance