[StephenKay]

Thanks for the reply - but I tried it and it doesn't get any different result. The php is still not executing. Here is a slightly simplified version of the kl_templates/header.php file:

<div id="back-gradient">
<!-- set below for skin width-->
<table id="main-table" width="970px" border="0" align="center" cellpadding="0" cellspacing="0" style="padding-bottom:15px">
    <tr>
        <td width="100%" align="left" valign="top">
        
            <!-- begin logo and graphic -->
            <div id="hdr">
                <table id="logo" cellspacing="0" cellpadding="0" align="center">
                    <tr>
                        <td rowspan="2"><img src="iSkin_Black/misc/klf_logo.jpg" alt="Karma-Lab Forums" height="111" width="268" /></td>
                        <td><img src="iSkin_Black/misc/klf_graphic.jpg" alt="KARMA Technology and the products incorporating it" height="86" width="685" /></td>
                    </tr>
                </table>
            </div>

            <div id="brd_outer">
                <div id="brd_in">
                    <!-- begin top black nav bar -->
                    <div id="nav_back">
                        <table width="100%" border="0" cellspacing="0" cellpadding="0">
                            <tr valign="top">
                                <td width="172" height="29" align="left"><img src="$stylevar[imgdir_misc]/nav_ls.gif" width="70" height="29" alt="" /></td>
                                <td align="center"><img src="$stylevar[imgdir_misc]/nav_welcome.gif" width="251" height="29" alt="" /></td>
                                <td width="172" height="29" align="right">
                                    <table width="182" border="0" align="center" cellpadding="0" cellspacing="0">
                                    <!-- begin navigation buttons table -->
                                        <tr>
                                            <if condition="$show['registerbutton']">
                                            <td width="87" height="29"><a href="register.php$session[sessionurl_q]" rel="nofollow"><img id="nav_reg" src="$stylevar[imgdir_misc]/nav_reg.gif" width="87" height="29" alt="" /></a></td>
                                            <else />
                                            <td width="87" height="29" id="usercptools"><a href="$show[nojs_link]#usercptools" accesskey="3"><img id="nav_menu" src="$stylevar[imgdir_misc]/nav_menu.gif" width="87" height="29" alt="" /></a>
                                                    <script type="text/javascript"> vbmenu_register("usercptools", 1); </script>
                                            </td>
                                            </if>
                                            <td width="75" height="29"  id="navbar_search"><a href="search.php$session[sessionurl_q]" accesskey="4" rel="nofollow"><img id="nav_search" src="$stylevar[imgdir_misc]/nav_search.gif" width="75" height="29" alt="" /></a>
                                            <if condition="$show['quicksearch']">
                                                    <script type="text/javascript"> vbmenu_register("navbar_search" ,1); </script></if>
                                            </td>
                                                <!-- End navigation buttons table -->
                                            <td width="20" height="29" align="right" valign="top"><img src="$stylevar[imgdir_misc]/nav_rs_end.gif" width="20" height="29" alt="" /></td>
                                        </tr>
                                    </table>
                                </td>
                            </tr>
                        </table>
                    </div>
                    <!-- content table -->
                    <table width="100%" cellpadding="0" cellspacing="0" border="0">
                        <tr>
                            <td>

                    $spacer_open
                    
                    $_phpinclude_output
                    $ad_location[ad_header_end]