The next/previous buttons in MyRadio only work for internet streams.
If you press Next and the next station is a FM station that station won't play.
If a FM station is playing and you press Next it will keep playing and won't switch to the next station.

Reported in the forums:
http://nolanparty.com/mediaportal.sourceforge.net/phpBB2/viewtopic.php?t=6820&start=0&postdays=0&postorder=asc&highlight=

To reproduce:
* make sure you have internetstreams and FM radiostations in the Radio >> Channels list in the configuration program.
* Start MP
* Go to MyRadio
* Start playing streaming radio
* press Next until you hit a FM station
* Radio will stop playing

* if a FM station is playing press Next
* Next does not work.