I went there, allowed scripting from all four of the domains, and still the song would not play until I allowed the .swf Shockwave Flash Object with the song.
You must have somehow allowed this, either temporarily, or had "apply these restrictions to trusted sites too" unchecked in NS > Options > Plugins. I suspect the latter to be the case.
You mentioned using "flash blocker". What kind? A Firefox add-on? A third-party tool? There could possibly be some sort of conflict between that and NS. I personally have found all of the Flash control that I need in NoScript and never felt the need for any other flash-blocking tools. I'm glad you got it fixed. (the reset probably "applied to trusted sites too")