O/T F.A.O. Admin DNS problem

Every time I try to get on this site the message below appears, this is the only site that I have this trouble with, I have contacted both Apple and BT and they state that perhaps it is because there is no index.html or,htm in the address I have had no problems in the past but this started to happen last Wednesday evening and I have been trying since then to get on site, this only happens in Safari and firefox, chrome which I am using now is OK


(You are seeing this page because you are using a Bt service that requires the use of BT DNS Server,and it appears you are attemting to connectusing a DNS server outside of our network, you may have selected a different server in your network settings or installed an application that uses an alternative service)
This is the site address I am using that keeps giving that message

viewforum.php?f=2

Can you please help me
Thank you

Every time I try to get on this site the message below appears, this is the only site that I have this trouble with, I have contacted both Apple and BT and they state that perhaps it is because there is no index.html or,htm in the address I have had no problems in the past but this started to happen last Wednesday evening and I have been trying since then to get on site, this only happens in Safari and firefox, chrome which I am using now is OK


(You are seeing this page because you are using a Bt service that requires the use of BT DNS Server,and it appears you are attemting to connectusing a DNS server outside of our network, you may have selected a different server in your network settings or installed an application that uses an alternative service)
This is the site address I am using that keeps giving that message

http://www.cardiffcityforum.co.uk/viewforum.php?f=2

Can you please help me
Thank you

Strange, not heard of that one before. I'll have a look into it and let you know.

Assuming you are at home, do you know if it happens on other devices/laptops/phones?

only on my mac using safari or firefox, when I went on the BT forum someone there had the same problem with another site

Owain, I just checked again and I can open every other forum with the exception of general chat, even the board index is alright but as soon as I click general chat that message appears