Call to a member function on a non-object
<p>I would appreciate help from anyone who has delt with a similar problem as below...</p>

<p>I have a web application that runs perfectly on localhost and on my external server.
I have recently uploaded it to a clients server and now receive this message:</p>

<p>"Call to a member function  on a non-object"</p>

<p>The php versions are both > 5.2</p>

<p>Any help would be appreciated.</p>
