Can't Access My Own Web Site !!

Can anyone help me with this strange problem.

I have my own web site (hobster.co.uk) which is maintained by me and hosted on a web hosting service in the UK.

Everyone in the world seems to be able to browse my site except me ! When I type in the address in either Firefox or I.E. I get the same response " cannot Find the Server "

I can access every other web site without problems - but not my own !

Even stranger - I can access the files by FTP to change the content - but cannot then browse to SEE the effects of any changes.

Please - what is going on ?

Thanks for any help you can offer

I am using Windows Vista Home Premium
Firefox 2.0.0.4 and latest IE version

Graham


PROBLEM SOLVED !! Not sure why it worked but what I did was to connect my laptop directly to the wireless router by cable. Did not make ANY alterations but I found I could access my web site without problem. When I disconnected and tried my main PC - I found that I could access it there too. Can anyone explain what had happened ??