security certificate error message

I get the following error message when I try to access a certain webpage :

The security certificate presented by this website was not issued by a trusted certificate authority.
The security certificate presented by this website was issued for a different website’s address.

Security certificate problems may indicate an attempt to fool you or intercept any data you send to the server.
We recommend that you close thiswebpage and do not continue to this website.
Click here to close this webpage.
Continue to this website (not recommended)

When I click on the last option i.e. continue to this website(not recommended).
the page times out and closes. Any ideas on how to fix this? some sites recommend that i load microsoft small business server 2003, but the fact that it times out after I click on option 3 prevents me from doing this.

To Exactly Let You Know Whats The Issue, I Need Some More Information Like

  1. What’s The website Address ?
  2. What’s The Version Of Internet Explorer You Are Using ?
  3. If Its Happening Only With IE7, Did You Checked Whether You Experience The Same Issue With Anyother PC Which Users IE6

more details needed.