Aha

I am in Canada so only have access to Aha and not Pandora. However, I am having trouble getting it to show more than one channel. I have set up an Aha account and selected the channels I want. When I link in the car the first channel shows up and by changing channels I get different podcasts for that channel (in my case BBC Global). On lower screen when I press the station key all of the stations are blank and I have no idea how to populate this screen. If I press a blank channel it takes me back to the main Aha screen.

Can anyone give me a primer on using Aha in Canada? Thanks