new threads rejected !

OK, I'm new to Xenforo, but not a complete idiot. I have setup Xenforo "xenforo_2.1.4 full_nulled"(my own forum) and created "nodes" and "Forums" & childs.
Asadministrator i have allowed all nodes full access. However, when I logon into the front end I cannot post a new thread ?
Also, i tried to to post with a registred user , but still the same problem.
i create a new group with full permissions, but still the same thing.
i found this errors in the log: 2 files missings : the probleme is wheni retransfer it & then i refresh ,it dissapear alone
i used both application : filezila & winscp
any ideas ?

That message does not mean that the files are missing. Report that the content is not as expected. And that is why it is 'nulled'. They appear to me and the forum works correctly.
About your problem, you have to check the permissions.