Request.ClientCertificate("Certificate") does not work in IIS5

From: cjh (c_jh@21cn.com)
Date: 06/16/02 

From: "cjh" <c_jh@21cn.com>
Date: Sat, 15 Jun 2002 23:12:46 -0700

In IIS5,the method Request.ClientCertificate
("Certificate") doesn't work,when using the method,it
returns some binary stream,msdn say that it's the client
certificate in binary mode,but after i write it to a file
and open it,I found that it looks like a certificate,but
it's not a valid one and IE can't recognize it either.
Somebody knows it?Are there some patchs can solve the
problem?Thank you very much.