I canot post on my wordpress blog

Hello,

I have a problem with posting pages and post. Catoregies works fine. I just typed a text for my blog. If I try to save it as draft it din’t work. As I press publish I get the same message (only draft changes into publish) in the message is somthing with failed. But as I open the autosaved draft (I think it’s autosaved) and then pres publish it works fine. Can someo’n help me???