Yeah, johnp is correct... in order to use the web interface you will need Java 6 (1.6.0_45-b6 32-bit is what I use) and IE8, I have nothing but issues with newer Java or different browsers. This is the same version that will work with the 3300 from about release 6.0 and later, which is why I keep it on my laptop.
If you have an old CD from the SX-200ICP, there is a terminal program in the Tools directory with the correct keymaps and graphics, or you can use Putty, connect to port 2000 on the SX200, and play with the font/settings to get the display correct (VT100/102 and ANSI or Terminal Font IIRC), it is much easier and faster than the web portal.