On the face of it, it looks like the AP selected cannot scan the channel that you want or the g radio is shut down. What version of ArubaOS is this? (it could be a bug, also).
You have two options (you can do both, actually):
- Tell us what you want to capture and we can tell you how to do it
or:
- Open a TAC case so that they can capture your exact workflow and if there is a problem file a bug with the functionality or identify your issue.