My programmers are telling me that you will need Sun's Java Runtime Environment (JRE) version 1.4 installed on your PC. The auction client is a java applet which will not work without the JRE.
You can find downloads for different operating systems here
http://java.sun.com/j2se/1.4.1/download.html
Test your system by going here
http://tauction.dnforum.com/client/client.html. If you get a gray square with login blanks, you're good to go.
If you have any troubles with the test, download and install the latest version of Netscape. It works fine without having to install anything.
A reminder: Auction Night will change to Saturday after this Sunday's auction.