PHP code only works on 1 server

Dear All, I wrote a simple PHP 404 handler (index.php)(see the code below) to catch missing pages for instance. But it only works on 1 server and not the other. This is the server where it works: My Server: http://www.orbitalnets.com/support/info.php This is the server where it won't work (which is the server where it should work): Setarnet: http://www.kabga.aw/info.php Could it be the version difference? How should it be coded to work on all php servers? Here is the code of the index.php file. <?php $errormsg .= "<div align=\"center\"><a href=\"http://www.kabga.aw/nl/index.php\"><img src=\"images/body/logo-kabga.gif\" width=\"215\" height=\"49\" border=\"0\"></a> </font></strong>"; $errormsg .= "<strong><font color=\"#333333\" size=\"-1\" face=\"Verdana, Arial, Helvetica, sans-serif\"><br>"; $errormsg .= "404 File not found<br><br><br><br><a href=\"mailto:info@kabga.aw\">info@kabga.aw</a><br><br>"; $errormsg .= " Tel: +297 582-4455<br>Fax: +297 582-2018<br><br></div>"; $navsignthing = "$page"; $extension = "php"; if(file_exists("$navsignthing.$extension")) { include "$navsignthing.$extension"; } elseif($navsignthing=="") { include "default.$extension"; } else { echo "$errormsg"; } ?> Please let me know, Dwayne Heronimo