Fix class naming calls

modules/host/classes/Model/Host/Server.php

@@ -21,7 +21,7 @@ class Model_Host_Server extends ORM_OSB {
 	 * Return the object of the product plugin
 	 */
 	public function plugin($type='') {
-		$c = sprintf('Host_Plugin_%s',ucfirst(strtolower($this->provision_plugin)));
+		$c = Kohana::classname('Host_Plugin_'.$this->provision_plugin);
 
 		if (! $this->provision_plugin OR ! class_exists($c))
 			return NULL;