If you are trying to use a third party app to listen to KRVS then your app may not have the updated stream links. Also, if you are using an internet radio appliance then you may need to manually update the links for KRVS.
Here is the generic mp3 link: put the http:// before the url below
playerservices.streamtheworld.com/api/livestream-redirect/krvsfm.mp3
http://playerservices.streamtheworld.com/api/livestream-redirect/krvsfm.mp3
Then, here is the playlist link which may be better suited for iOS systems:
http://playerservices.streamtheworld.com/pls/KRVSFM.pls