[Plugin: WP Super Cache] Cached pages appear blank

Hi!

I am trying to use wp-super-cache in my blog, but something fails. After turning it on, my pages only load the first time, the second one nothing appears (blank page). I presume that the caching is not working…

– I have deactivate all the plugins, without success.
– I read the Troubleshooting and I tried a couple of things.
– I have also reinstall the plugin (deleting all the stuff first).
– The problem is also present in half-on mode.

Any Ideas? thanks…