Photo Uploader into posts stoped working

Hello,
I need a helping hand with my WordPress, where presented a problem never been. I try to upload a photo in a post, but it′s imposible. After making discription and tags and click on “insert into post”, there apears the ligtbox and at bottom left “ready” and nothing happens. I tryed flash uploader and browser uploader, but not resolve the problem. Close the window also don′t work, i have to click the “back” button and arrive on the previos post. Really strange, has anybody an idea how to resolve?