i am having problems opening a certin website carfixz.co.uk
i am an administrator on this site but i am the only one who seems to have a problem opening it
and i also cant open any sites that are hosted by the same hosting company that we use (www.yourhosting.co.uk)

was working ok one day then went to open it the next day and it wouldnt open

i have tryed changing my explorer settings
i have done all updates
i have tryed another web browser (mozila)
done a system restore back to a couple of days before it happend
and the last idea i had was to format the full computer so i done that

and it still wont open
any ideas folks?????????????????????