Posts just aren't posting!

Hi

My site was recently hacked. Since then I’ve had it restored and secured. However when I go to post a new post to my posts page, no post is shown at all and nothing happens after I’ve pressed “Publish”. It simply goes back to a list of old articles I’ve posted. I can’t see any new post, even a test one won’t go up or show in the list of old articles (posts).

Any ideas? I’m really at a loss here!