Right now all my favorite stations lock up on the ad when I try to listen to Rush.
They all seem to use the same service and it gets 3 seconds into the ad and locks up.
If you are using internet, try this stream.
http://player.listenlive.co/23171
If that does not work, you need an AM radio.
That happens to me sometimes, too, only not just on the ads. Often times it happens just as Rush is getting wound up, talking about something that I really want to hear.