Microsort Root SCG Authority to Expire
Hope this is not too late, just read this at www.asp.net. From the source..
”On July 16, 2004, the Microsoft Root Server-Gated Cryptography (SCG) Authority will expire. This internal CA cross-certifies the thawte Server CA, which provides SGC Secure Sockets Layer (SSL) certificates for browsers. SGC technology allows most 40- or 56-bit browsers to use 128-bit encryption when connecting to a Web server that has an SGC digital certificate installed...”
You should upgrade your browser to latest version and get one with 128-bit SSL support.