OverGaming on "[Plugin: W3 Total Cache] Plugin could not be activated because it triggered a fatal error."

I tried to install W3 total cache but every time I get this message when I press activate plugin after I upload everything and chmod them to 777 ,

Warning: include() [function.include]: Unable to access /home/overgami/public_html/wp-content/plugins/w3-total-cache/lib/W3/ConfigKeys.php in /home/overgami/public_html/wp-content/plugins/w3-total-cache/lib/W3/ConfigAdmin.php on line 48

Warning: include(/home/overgami/public_html/wp-content/plugins/w3-total-cache/lib/W3/ConfigKeys.php) [function.include]: failed to open stream: Permission denied in /home/overgami/public_html/wp-content/plugins/w3-total-cache/lib/W3/ConfigAdmin.php on line 48

Warning: include() [function.include]: Unable to access /home/overgami/public_html/wp-content/plugins/w3-total-cache/lib/W3/ConfigKeys.php in /home/overgami/public_html/wp-content/plugins/w3-total-cache/lib/W3/ConfigAdmin.php on line 48

Warning: include(/home/overgami/public_html/wp-content/plugins/w3-total-cache/lib/W3/ConfigKeys.php) [function.include]: failed to open stream: Permission denied in /home/overgami/public_html/wp-content/plugins/w3-total-cache/lib/W3/ConfigAdmin.php on line 48

Warning: include() [function.include]: Failed opening '/home/overgami/public_html/wp-content/plugins/w3-total-cache/lib/W3/ConfigKeys.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/overgami/public_html/wp-content/plugins/w3-total-cache/lib/W3/ConfigAdmin.php on line 48

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Any help ?

http://wordpress.org/plugins/w3-total-cache/