You're missing one step that buried in a post somewhere here. This isn't exact, but you'll be able to figure it out:
If you've never used recovery from Rom Manager before, tap the top option to "Flash CWM Recovery", choose the only option there (touchpad). Pick the 2nd option (4+). You should get a "Superuser Request"... tap "Allow", followed by "Success". Then you should be able to boot into recovery.
I'll correct this and the RM document later.