Installation troubleshooting with Koala XSL-Engine

I've just installed Koala XSL (v0.7b3; DOM SDK 1.0 PR3B), but the simplest
test failed:

C:\xsl\Xsl\demos\frames>java fr.dyade.koala.xml.xsl.Main -r noframes.xsl
frames.xml
Xsl, parsing noframes.xsl
Xml, parsing file:C:\xsl\Xsl\demos\frames\frames.xml
com.docuverse.dom.DOMExceptionImpl
        at java.lang.Throwable.<init>(Compiled Code)
        at com.docuverse.dom.DOMUtil.newException(Compiled Code)
        at
com.docuverse.dom.AbstractContainerNode.removeChild(AbstractContainerNode.j
ava:271)
        at
com.docuverse.dom.BasicDocument.removeChild(BasicDocument.java:185)
        at com.docuverse.dom.BasicElement.normalize(Compiled Code)
        at fr.dyade.koala.xml.xsl.XslEval.initXSL(Compiled Code)
        at fr.dyade.koala.xml.xsl.XslEval.<init>(Compiled Code)
        at fr.dyade.koala.xml.xsl.Main.ParseFiles(Compiled Code)
        at fr.dyade.koala.xml.xsl.Main.main(Main.java:21)

The same exception was thrown, when I installed DOM SDK 1.0 PR2 instead of
DOM SDK 1.0 PR3B.
"frames.xml" was original Koala\demo\frames file:
<?xml version="1.0" encoding="ISO-8859-1"?>
<root>
<title>
What could you do with XSL?
</title>
<p>Using XML and XSL, you could easily have 2 versions of your HTML pages.
One with frames, the other without.</p>
<frameset>
     <frame width="20%">Here are the stuffs you want to put in the first
frame.</frame>
     <frame width="80%">Here are the stuffs you want to put in the second
frame.</frame>
</frameset>
<p>Just have a look at the <frames/> and the <noframes/> in this
directory</p>
</root>

What's going wrong?



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