Warning: require_once(PEAR.php) [function.require-once]: failed to open stream: No such file or directory in /var/www/web251/test/Cont/pear/Spreadsheet/Excel/Writer/Format.php on line 35

Fatal error: require_once() [function.require]: Failed opening required 'PEAR.php' (include_path='.:') in /var/www/web251/test/Cont/pear/Spreadsheet/Excel/Writer/Format.php on line 35