iLo2: up / down arrow key doesn't work for HP Proliant DL360 G5

This happened when I try to change some BIOS configuration, struggled for a while, and find this configuring ESXi with iLO 2 on bl490c - up/down arrow don't work.

Thanks to the poster for the simple solution:  Works with the Java-version, but not in the IRC.

Some one mentioned turn off IE protection mode also could solve the problem, but I didn't bother to try it.