Sound doesn't play properly

i call play() on an audiotrack (laser.ogg from jmetest), but 19 out of 20 times, i hear nothing.

sometimes, i get this error:

12.09.2008 22:38:50 com.jmex.audio.openal.OpenALStreamedAudioPlayer playInNewThread
SCHWERWIEGEND: Audio Error!
org.lwjgl.openal.OpenALException: OpenAL error: Invalid Value (40963)
   at org.lwjgl.openal.Util.checkALError(Util.java:56)
   at org.lwjgl.openal.AL10.alBufferData(AL10.java:1044)
   at com.jmex.audio.openal.OpenALStreamedAudioPlayer.stream(OpenALStreamedAudioPlayer.java:319)
   at com.jmex.audio.openal.OpenALStreamedAudioPlayer.playStream(OpenALStreamedAudioPlayer.java:190)
   at com.jmex.audio.openal.OpenALStreamedAudioPlayer.playInNewThread(OpenALStreamedAudioPlayer.java:214)
   at com.jmex.audio.openal.OpenALStreamedAudioPlayer.play(OpenALStreamedAudioPlayer.java:166)
   at com.jmex.audio.AudioTrack.play(AudioTrack.java:113)
   at hstar.hhexen.entity.DestructableEntity$1.onDamageTaken(DestructableEntity.java:70)
   at hstar.hhexen.entity.event.EventDispatcher.onDamageTaken(EventDispatcher.java:96)
   at hstar.hhexen.entity.DestructableEntity.onDamage(DestructableEntity.java:131)
   at hstar.hhexen.entity.usableitems.EffectEntity.applyEffects0(EffectEntity.java:112)
   at hstar.hhexen.entity.usableitems.EffectEntity.applyEffects(EffectEntity.java:96)
   at hstar.hhexen.entity.DestructableEntity.hitBy(DestructableEntity.java:115)
   at hstar.hhexen.entity.event.CrossApplyUtils.onContact(CrossApplyUtils.java:43)
   at hstar.hhexen.entity.usableitems.EffectEntity.onContact(EffectEntity.java:166)
   at hstar.hhexen.engine.core.entities.Entities$DefaultContactApplier.handleContact(Entities.java:496)
   at hstar.hhexen.engine.core.entities.EntityGrid.applyFunctionOnContact(EntityGrid.java:163)
   at hstar.hhexen.engine.core.entities.Entities.handleCollisions(Entities.java:204)
   at hstar.hhexen.engine.core.entities.Entities.onTick(Entities.java:276)
   at hstar.hhexen.engine.core.Core.onTick(Core.java:242)
   at hstar.hhexen.engine.AbstractHhexen.update(AbstractHhexen.java:89)
   at com.jme.app.BaseGame.start(BaseGame.java:79)
   at hstar.hhexen.Main.main(Main.java:33)



what could be wrong? i don't see any difference between hellointersection and my code

in case someone else has the problem: you must not stream sound effects, it won't work, but it does on music.