can't add / edit new post ( contains problem's image)

i have just installed the new version of wp on my site , then i have faced
this problem when i tried to add a new post

I can’t add / edit new posts because it won’t switch to Visual editing, only html code, there is no formatting toolbar and media upload button doesn’t work, html text is white on white background?!

this image will explain my problem
http://dogsplane.com/images/newpost.png