IndexOutOfBoundsException on gluUnProject in lwjgl 2.0rc1

[coasternuts]

Here is the code:

private FloatBuffer outXYZ = BufferUtils.createFloatBuffer(4*4);

System.out.println( outXYZ + ":" + outXYZ.capacity() + ":" + outXYZ.position() );
GLU.gluUnProject( xyz[0], xyz[1], xyz[2],
                        modelView, proj, viewport, 
                        outXYZ );

Output:

java.nio.DirectFloatBufferU[pos=0 lim=16 cap=16]:16:0

Exception in thread "AWT-EventQueue-0" java.lang.IndexOutOfBoundsException
        at java.nio.Buffer.checkIndex(Unknown Source)
        at java.nio.DirectFloatBufferU.get(Unknown Source)
        at org.lwjgl.util.glu.Project.__gluMultMatricesf(Project.java:180)
        at org.lwjgl.util.glu.Project.gluUnProject(Project.java:351)
        at org.lwjgl.util.glu.GLU.gluUnProject(GLU.java:321)
        at GLCharts.Camera.projectToViewPlane(GLCanvas.java:1075)

Any ideas? 

This is why I detest Buffer's.  When do I rewind?  When do I clear? 
(I realize my buffer capacity is larger than it needs to be, I was trying to rule that out.)

Any help is much appreciated.
Thanks

[coasternuts]

The modelView, proj, and viewport needed a rewind(). 
Not the outXYZ.