Make sure that in conf/_admin.php you've set $use_fileupload to = 1. Also make sure you've set all the right permissions

http://b2evolution.net/man/2004/06/04/file_permissions

Hi Graham,

Thanks for the quick responce, have done everything you mentioned on that post, and i'm still getting the same error.

I am having the same problem of absence of the upload button (b2evo v 0.9.0.12), but the button is present for a person of the admin group (and the upload works). It is only for the other groups that the button is not there...

Any suggestion ?

per default only users with a userlevel higher than 1 (2 and up) can upload images.
The userlevel is used for nothing else than that.
Check in the userpermissions for the userlevel.

You need to have level 3 minimum to have access to upload.

look at admin/_admin.php

$fileupload_minlevel = 3;

thanks a lot. It worked as you explained. What I did to allow everyone to upload photos was to put $fileupload_minlevel = 0 in admin/_admin.php.