symeon.mattes on "[Plugin: W3 Total Cache] Wp3 object cache error"

Hi I installed 0.9.3 wp3 cache and I receive the message:

The Object Cache add-in file object-cache.php is not a W3 Total Cache drop-in. Remove it or disable Object Caching. (remove it for me)

It used to work quite well in the older version. Furthermore, every time I press remove it for me it gives me as an error that I don't have enough permission.

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