Getting database error when page first loads.

I'm getting the following error when I first load a page in the browser.  If I hit refresh the error goes away.  Any idea whats causing this?
---------------------------

 The system has attempted to use an undefined value, which usually indicates a programming error, either in your code or some system code.

Null Pointers are another name for undefined values.
 
The error occurred in D:\Inetpub\mymobi\index.cfm: line 8

6 : </head>
7 : <!--- Pulls the data for the about section --->
8 : <cfquery name="paragraph" datasource="security">
9 : select * from about
10 : </cfquery>Start Free Trial