cache tester error on wp super cache

Hello.

When I click on the “cache tester”, the following results gained:

Fetching http://www.shogitech.com/wordpress-3.2.1/wordpress/ to prime cache: OK

Fetching first copy of http://www.shogitech.com/wordpress-3.2.1/wordpress/: OK (1.html)

Fetching second copy of http://www.shogitech.com/wordpress-3.2.1/wordpress/: OK (2.html)

The pages do not match! Timestamps differ or were not found!

I wonder why the screen reveals “The pages do not match! Timestamps differ or were not found!”. Is anything wrong? I want to get it clear immediately. Please help me. I have a bad headache for more than 10 days over this issue. I need your great help.