Index: api/rpc/class.czbxrpc.php
===================================================================
--- api/rpc/class.czbxrpc.php	(revision 27956)
+++ api/rpc/class.czbxrpc.php	(working copy)
@@ -89,7 +89,9 @@
 			unset($params['nopermissions']);
 
 		list($resource, $action) = explode('.', $method);
-
+               // class name should be not case sensitive, the same as for $action
+               $resource = strtolower($resource);
+
 		$class_name = API::getObjectClassName($resource);
 		if (!class_exists($class_name)) {
 			return array('error' => ZBX_API_ERROR_PARAMETERS, 'data' => 'Resource ('.$resource.') does not exist');