Setup Radio card.
Press autotune, and then in next window START
YOu will get a crash.
Only once it worked for me

h4. Additional Information
System.NotSupportedException: Signal strength not available.
   at DirectX.Capture.Tuner.get_SignalPresent()
   at MediaPortal.Configuration.RadioAutoTuningForm.OnPerformTuning(Int32 stepSize)
   at MediaPortal.Configuration.AutoTuningForm.tunerTimer_Elapsed(Object sender, ElapsedEventArgs e)