Thanks for responding mate, much appreciated.
I have emailed your contact address regarding the activation email as suggested. I don't think it is my security settings as I did receive an initial email from you acknowledging my registration for the forum so I am able to get emails from you. That first email indicated I would receive a second email from you once the forum registration was approved/activated, and that is the one I am waiting on. No dramas mate, I am not in any great rush.
As for the issue with the mission, I think you may have misunderstood me...I am not crashing or anything like that..the game and the mission works perfectly fine...I am able to fly the mission over and over...the problem is that once I have finished the mission and landed safely at base, i am not able to continue the campaign....When back in the menu, I can only replay the same mission or leave the campaign...so i am stuck flying the same mission over and over again. I hope that makes sense. It is mission 609-4 where I am stuck.
I am indeed using the new beta so that may well be the problem. I understand and accept that you can't support Beta versions, so i am happy to wait until the next official patch (and any updates you may choose to do then).
PS: congratulations on your superb work...the 5 missions (including the two training missions) have all been fantastic, and I will be buying your further campaigns once they are translated into English (hopefully soon ...hint hint).