There's a post/qusetion already somewhere in the forum. It has to do with your hosting provider supporting http post or something. I actually have the same problem where I cannot upload images to my media directory.

Have you tried using Live Writer as your editor? With that, livewriter can FTP the images automatically.

do a search on livewriter and you'll see the instructions. works great.

My installation of b2evolution 2.4.5 is under ispconfig. Installation of the blog files is done with uid and gid of the user (eg user: web2_test grp: web2) but when b2evo creates the .evocache directory, it is created with user: apache2 grp:apache2 without write permissions.

Even if the .evocache directory is manually created with full permissions, then files then created are as apache/apache and still do not work.

Hope this helps

I've no idea if this will work as I run suphp, but

1) delete all the sub-directories of /media/blogs/ && /media/users/
2) chmod /media/ && /media/blogs/ && /media/users/ to 0777
3) hit the files tab in admin and see if it all goes green

¥