Problem with sound under GNU/Linux

[sq8ijk]

hello,
I have a small problem using sound under GNU/Linux - on Windows works fine, when I am loading data from buffer:

WaveData wavefile = WaveData.create("samplefile.wav");

I've got an NullPointerException exception:

at org.lwjgl.util.WaveData.create(WaveData.java:95)
at org.lwjgl.util.WaveData.create(WaveData.java:112)

I am using Eclipse, so maybe sth. is wrong with resource path?
But when I was trying to load it from URL the same thing occured

any Ideas?

--
best
sq8ijk