Cannot upload any files and errors.log doesn’t work

Hi, I try to install Omeka 2.5 on third server, because there was no possibility to have access to ImageMagick on the first two.
Now the test for Imagemagick shows Success, and everything else seems to work properly, but I cannot upload any files.
I gave full access rights to Files and included folders (777) and each time I try to upload anything I get this message:
You don’t have permission to access /admin/items/edit/3 on this server. >
(of course there is no such directory there…)
I tried to find some trace about errors, so I activated and gave full access rights to errors.log file and its directory (application>logs), but nothing is written there - size is zero.

I suspect some URL rewriting problem (.htaccess is standard - the whole site works OK.).

Could you please help me somehow? (I’m not a programmer :slight_smile: )

URL rewriting sounds like a decent guess… but it’s odd that you’d only see the problem on the edit page. You can do everything up until actually uploading the file? What about saving an Item but with no file uploaded?