j'essaie jpgraph sous easyphp

mais j'obtiens ces messages d'erreur,
Warning: include(jpgraph/jpgraph.php) [function.include]: failed to open stream: No such file or directory in C:\Program Files\EasyPHP 2.0b1\www\graph01.php on line 3

Warning: include() [function.include]: Failed opening 'jpgraph/jpgraph.php' for inclusion (include_path='.;C:\PROGRA~1\EASYPH~1.0B1\\php5\pear\') in C:\Program Files\EasyPHP 2.0b1\www\graph01.php on line 3

Warning: include(jpgraph/jpgraph_bar.php) [function.include]: failed to open stream: No such file or directory in C:\Program Files\EasyPHP 2.0b1\www\graph01.php on line 4

Warning: include() [function.include]: Failed opening 'jpgraph/jpgraph_bar.php' for inclusion (include_path='.;C:\PROGRA~1\EASYPH~1.0B1\\php5\pear\') in C:\Program Files\EasyPHP 2.0b1\www\graph01.php on line 4

Fatal error: Class 'Graph' not found in C:\Program Files\EasyPHP 2.0b1\www\graph01.php on line 10

j'ai activé GD2, je ne sais pas quoi faire, je n'ai peut être pas installé jpgraph correctement

merci de votre aide

jean