stinkywinky
I had to change the value for php_value upload_max_filesize in the php.ini. But I couldn't upload bigger files. The limit is still 2M, as it used to be bevor my change, according to info.php.
When does the new setting become active? Do I have to restart the server for this, or is there any better way? Server is an IIS, and I'm not it's admin :-(