Trust me, I know all of that. After some research from others who have had this happen (see it has worked for me for years so not sure what happened) I simply uninstalled and reinstalled REX and it works again. I still would like to know what caused it to fail in the first place. So you see it is not necessarily a matter of firewall influence as the message states. That's a fact not that it couldn't be in other circumstances but not here. I would still like to know what caused it but the possibilities are unknown now do to the fact I use this computer for a lot of other things and maybe in a clean up something was removed. From what I read nobody has figured it out yet.