Sometimes Streaming Audio, Sometimes Not

I'm using a BAS Receiver v. 1.2.5 (actually at two separate propertys) and have had no real problems EXCEPT...that I've found that occasionally, though Streaming Audio is activated in Preferences and the Audo Tab shows in the lower right of the screen..that sometimes when I press the play button...the right facing arrow...it almost immediately flips back to off. All settings are correct for Land and the Receiver...and this Sim experiences little lag. Any idea what might be causing it?. Thx.

Play the stream in Winamp or some media player to confirm it's actually operational. Sometimes servers go down or change addresses. If that's not the case, then at least you have verified it's a SL-only issue.