Warning: require(fpdf.php): failed to open stream: No such file or directory in C:\webroot\tsdlib\pdf\oat\fpdf_thai.php on line 13

Fatal error: require(): Failed opening required 'fpdf.php' (include_path='.;C:\php\pear') in C:\webroot\tsdlib\pdf\oat\fpdf_thai.php on line 13