Cannot insert or manage images in blog post

I am not able to insert images to a post. I click on
- Upload a Media and choose a file from my computer. It appears in the Upload Media window as complete and I can see it on the server in a folder that appears randomly named in images/easyblog_images/xxx where xxx is a number that I didn't create
- When I click on Insert button, nothing happens
- When I click on Browse media I get the message "Unable to get file list from server" in the My Media and Shared Medial folders window
- Clicking on Change upload folder does nothing

I'm lost