Added "-port=25007" (Without quotations), same results for game. Was I supposed to restart after that? it looks like it saved straight away and if I go back in there it still is there in that menu. unfortunately no fix.

I went into my router settings and the below option was unselected so I assume that means my upnp is already off.

Allow changes to security settings over UPnP
Devices like Smart TV and smartphones, and applications that support UPnP, can be used to change security settings in the home network automatically, such as the FRITZ!Box port forwarding rules. For reasons of security, only enable this option if you really want to allow incoming connections from the Internet.

After your last message I have phone my internet provider who also helped me connect to the NBN with a new router.
It turns out the router was causing the issues.
I have a fix to my problem now and am working it out with my internet provider.

Thankyou so much for your time and effort, I really appreciated your help in trying to fix the problem.

Now I can get back to looking for baked beans and ammo....lol

Much appreciated.
Chris

when I play the game by myself.
My boys play rarely.
Because my profile was not working, I tried logging into steam(on my own computer)as my first sons profile just so I could play but the same issue happened.
So then I tried my second sons profile on his own computer and he has the same problem as well.
We have recently changed over to the NBN from broadband but no other games or on line activity have been affected at all.

Just tried again, same thing, cant interact with anything in the game(doors, items etc), can move around though, cant interact with anything in my backpack (when I put the curser over things it says 'receiving' and doesn't change. It does save my position in the game though, so if log in and move, after a minute it then kicks me out with 'confirmation of changes' message, but my position is updated in the game when I log back in.

http://steamcommunity.com/profiles/76561198041285675/

is this what you were after??

Thanks for helping, im really hanging to play again :-).