Sorry my bad english .
Okei
First I go to tomshardware.com and I pick a random news article and make a reply . OK here no problem.
Second , being on tomshardware.com I click on forum and I am redirected to tomshardware.co.uk where I pick a random post and I get the message(Sorry! You don't have permission to answer.) .
Thats my problem . And I manually change
http://www.tomshardware.co.uk/forum to
http://www.tomshardware.com/forum and again I am being redirected to
http://www.tomshardware.co.uk/forum
I have done this at my office where I have full access to my router and at home . With default dns and open dns . tested also on IE , FF and Opera