> When i am trying to browse my default website,it was showing
> "page cannot be displayed" error.
> The IIS services all are running.
> But i don't why it still not browsable.
Is DNS taking you to your local server?
Is the default website up (and not stopped) in IIS? My guess is that it is stopped.
Check the bindings - that the default website is indeed the default.
Is the default website (when it works) just showing a html page or is it something more complex like a php or asp site? In which case it might be the content - but if you look in the logs that IIS generates you should at least see if IIS thinks a request has made it that far.