iis 7 - self-signed certificate issue in IIS 7.0

I am setting up IIS 7.0 on a Windows Vista box. I am using self-signed certificate (by using built-in Create Self-Signed Certificate feature of IIS 7.0) on a web site. The I can browse from the local machine (the machine with IIS and web site) for the https address, for example, https://machinename/test.html, it works.

But when I browse another machine, using the same url, https://machinename/test.html, it does not work (browsers shows cannot connect error message). when browse from another machine using http, e.g. http://machinename/test.html, it works. Any ideas what is wrong? Any limitation of self-signed certificate from another machine?

thanks in advance,
George