YES!, the other disks work... 3 , 4, & 5 ONE AND TWO will not load..
Funny , I just got a robot email from them saying...

ARE YOU LOOKING FOR SERIAL #s to install add ons 1 or 2?
Add ons 1 and 2 use the serial #s from your classic, deluxe or G2, and
do not have their own serial #s. Please use your serial #s which include
-RF- , -U2-, -G2-, or -RD- serial # to install your add ons.
Anyways I will get this figured out..
Jeff