Read Ian's post #234 this thread and following posts.
On another matter, on a number of occasions lately, at around 6:30 to 7:30 in the evening, I received "Server not found" for this site and Whats Up, but no problem with Facebook, Yahoo or other sites. Access returns again after 9 pm.
Red I have been having similar problems occasionally throughout the day, I have just got back on now but haven’t been able for the last hour or so but all the other websites are still working so not an internet problem.
They can't seem to find anything wrong with the server itself. I have my server tech (software) who is in the UK at the moment having a look at it tonight so I will see what he says about it. What I do know is the server itself is not under any stress, in fact it is even running below idle as there are plenty of resources in it i.e. processor speed, ram, hard disk space and speed etc.
Personally I think it is a DNS issue of some kind so I have earmarked that with the tech to have a look at tonight.