completly new to beagleboard...

I have the xM version of the board. I am using windows xp. Using hyper
terminal I turned on the beagleboard and comunication between it and
my computer works fine. after a couple of seconds I see the angstrom
logo, and i am asked to login. I then tried to type in "root"
according to:

using the hyperterminal. I get no responce, and can't proceed any
further... what am I doing wrong?