Try to access a website and redirected to a completely other site unrelated

I have just a few hours ago installed my new virgin internet on my Windows Vista. everything is working perfect, but when i try to access facebook (www.facebook.com) i am instantly re-directed to the frist website i went on when i started my virgin internet, which is the virgin activation website. is there any way i can stop being re-directed to this site? i jsut want to access facebook but it wont let me! i dont even see the page. Thank you :) == URL of affected sites == http://http://act2.virginmedia.com/#!/?ref=logo www.facebook.com