Warning: include_once(lib/Calendar3.class.php) [function.include-once]: failed to open stream: No error in F:\ACAD\labreserve\phpscheduleit\roschedule.php on line 23

Warning: include_once() [function.include]: Failed opening 'lib/Calendar3.class.php' for inclusion (include_path='c:\php\pear\pear;c:\php\includes;c:\php\pear') in F:\ACAD\labreserve\phpscheduleit\roschedule.php on line 23

Fatal error: Class 'Calendar3' not found in F:\ACAD\labreserve\phpscheduleit\roschedule.php on line 27