Q: ATV hung up playing radio through itunes

I am trying to play iRadio through my ATV's and through my iTunes.  In both cases the Radio appears to lock up after only a few seconds of playing.  If i am playing the iRadio through my PC iTunes it appears to be playing normally, but, does play to ATV.  Is there a way to test connections or trouble shoot why this is happening?  Last night we played iRadio off of ATV for several hours with no issue.