I fixed the problem. Guess I was just working to fast. I enabled the debug-mode in wp-config, and waited at bit. And when I tried to re-install wordpress, the debug Message showed that it was 2 of my plugins that coused the problem. But I don’t understand why it didn’t work correctly when i disabled the plugins and changded name on the pluginfolder earlier. But the problem was gone after i delted the 2 plugins.
