[Plugin: WP Super Cache] Error uninstalling wp-cache2: advanced-cache.p

Hi! I’m trying to install wp-super-cache.
I had wp-cache2 plugin and, as told on the readme.txt, I disabled it, and then deleted all wp-cache related files.

Then I got an error message when trying to acces the homepage of my blog: Unable to access /…/…/wp-content/advanced-cache.php

I solved this problem by creating a “fake” advanced-cache.php file (just a blank txt), and now everything is ok…. except I still have this (fake) wp-cache2 file in wp-content, and so I can’t install wp-super-cache!!

How can I delete advanced-cache.php and not get that error message?
Thank you!