Problem with attachments

Hi everyone!

I have same situation like this:
http://wordpress.org/support/topic/plugin-wp-user-frontend-usage-with-anonymous-user

post is very useful, but i find new problem!
if i do all, like f sg1_anhell say, attachments upload is not working.

files are loaded, but then the download progress bar disappears and nothing else comes up.

Help please!

http://wordpress.org/plugins/wp-user-frontend/