Warning: require(fpdf/fpdf.php) [function.require]: failed to open stream: No such file or directory in /pdf.php on line 2

Warning: require(fpdf/fpdf.php) [function.require]: failed to open stream: No such file or directory in /pdf.php on line 2

Warning: require(fpdf/fpdf.php) [function.require]: failed to open stream: No such file or directory in /pdf.php on line 2

Fatal error: require() [function.require]: Failed opening required 'fpdf/fpdf.php' (include_path='.:/:/usr/local/php5/lib/pear') in /pdf.php on line 2