Plugin cause Error 500

Error 500 (Internal Server Error) is a generic error message related to server. While, I understand that this error comes up when activating WP Super Cache, the reason for this error may be found in the server logs.

But in the server log there’s nothing about this error (only when I activate the plugin!)

You may use a different error_reporting value in php.ini to see the errors.

OK…
Even if I’ve solve the 500 Error, there’s now another error: WP Super Cache not working!

When I try to test the plugin, this say: “The pages do not match! Timestamps differ or were not found!” So, I’ve start the log system, and I’ve see this error: “No closing html tag. Not caching.” But all the html tag are closed! If I try to test the plugin with all the plugins deactivated, the results is the same!

I’m going crazy! >.<