I can’t post, need help urgently!

Hi guys, I can not post for a week and I can’t find any solution here, I could see that some people had the same problem.
My problem is:
Everytime I try to post with picture, nothing happen, the post does not appear (sometimes even just only text). Sometimes the auto-save button keep works automatically and the “upload” button disappear.
Now I can not upload pictures as well.
I have deleted everything and reinstalled again (no overwrited) and nothing. I cleared my cache and nothing. I also updated my flash version and nothing, I can’t even post via windows live writer it says: “
the response to the metaWeblog.newmediaobject method received from the weblog server was invalid:
Invalid response document returned from XmlRpc server”