did you put in the proper hboot when you requested the beta key? just type the beta key in,being extremenly cautios of wether the letters are letters or numbers,or upper/lower case.
i guess you might download again and request a new beta key... the only other possiblility i can think of,if you entered the correct hboot is if you entered your serial number incorrectly.
when you plug your phone in,and revolutionary finds it,it will list the serial number,hboot,and android version,even the build number of your firmware.
pay close attention to what your serial number is so you can enter it correctly.
let us know how it goes