UPDATE . All the permissions are correct, ran the repair script and checked for any errors on my database but still having the same problem..
This morning I logged on with my Blackberry and was able to post ! Thought the problem went away but as soon as I logged on with my laptop I was given the same error message.
Thanking it was a cookie problem, i phoned one of the members in Orlando Fl and he had he same error message ..
So Blackberry OK , PC not OK ... I left a service ticket with my host provider and waiting for their return message, so i hope its something on the host side and not the SMF side..
FYI _ just installed another forum in a different location on the same server (different dbase also) and the same problem occurs __ it has to be a problem with the hosting company and not the SMF forum... I'll let you know what their answer is after I finally get one.