Cable Box setup

I am trying to use a cable box with ir blaster. On the "Test Channel
Changing" screen, when I click
"The settop box changed the channel correctly", it opens a popup boxing
asking to enter the channel number. Even after changing the channel few
times, it never enables "next" button, and I cant not move to the next
screen, even though channel changing is working.
What am I doing wrong? Is this a bug?
I am using Win 7 ultimate 64-bit

Sorry. Wrong forum.