@PoP: That usually means wrong arch.
Try this (untested, I just didn't have anything better to do
You'll probably have to call an SSH client or a patched busybox login applet, unless you know your root password. And disable SSL, it seems sligtly broken, and will call openssl to generate a cert, which will probably take forever on the Kindle HW.
And, if it even works, you probably won't be able to do much, because I assume it expects a full 105 keys keyboard ;o).