Firstly I'd like to say I think this sound system is great

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Secondary I've encountered an issue with playing .ogg files that are of a small size (for instance 13kb). I can play it in another media player (Winamp for example) but not using the sound system. When I change the file to a larger sized .ogg (a track of size 500kb) it works fine. Is there a lower size limit for use of .ogg?
I encounter this issue using LibraryLWJGLOpenAL.class and LibraryJavaSound.class whilst I have also tried CodecJOrbis.class and CodecJOgg. Any ideas?
EDIT: It also works with .ogg of file size 184kb. So I guess there may be a lower size limit?