URGENT:How to get out of the error.(stat failed,smarty:unable to read resource)

I installed a package called etraining in our site.We are now getting error messages …

Warning: filemtime() [function.filemtime]: stat failed for /home/fhlinux198/q/questtuitionhouse.com/user/htdocs/admin/preferences.conf in /home/content/e/n/e/enetlinux/html/osm/smarty/Smarty.class.php on line 1558

Warning: Smarty error: unable to read resource: “/home/fhlinux198/q/questtuitionhouse.com/user/htdocs/admin/preferences.conf” in /home/content/e/n/e/enetlinux/html/osm/smarty/Smarty.class.php on line 1102

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