Thanks for your reply. I have done everything you say but that did not rectify the error so I downloaded and reinstalled the google maps ext again and now there is not an error if I change the flag or connect the directions form to the ext. So that ironed out the problem of the map not displaying with the error message.
Regarding the address I have changed it to prove that was not the problem, but it has been working with the orginal address, I believe this is because I have registered the address with google a month ago and I am just awaiting the verification pin off the owner of the address. But for arguement sake I have left it as you suggested while you help me solve the problem.
So now the map displays but the directions still dont work. Can you advise me what to do next to sort this problem?