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J/Link under Linux Mandrake 9.0


I installed JLink v1.1.3 (and v2.0.1) on my Linux
Mandrake 9.0 system using jsdk 2 exactly as explained
in the manual (all possible ways to set classpath and
native librarys), but when I try to InstallJava[] or
from command line I put "java
com.wolfram.jlink.Install", I get the following
stderr:

J/Link (tm)
Copyright (C) 1999-2000, Wolfram Research, Inc. All
Rights Reserved.
www.wolfram.com
Version 1.1

java.lang.NullPointerException
        at
com.wolfram.jlink.NativeLink.MLOpen(NativeLink.java:native)
        at
com.wolfram.jlink.NativeLink.<init>(NativeLink.java:82)
        at
com.wolfram.jlink.MathLinkFactory.createMathLinkGuts(source
file unknown:line unknown, pc 0x827ca98)
        at
com.wolfram.jlink.MathLinkFactory.createMathLink(source
file unknown:line unknown, pc 0x81dd5f3)
        at
com.wolfram.jlink.MathLinkFactory.createKernelLinkGuts(source
file unknown:line unknown, pc 0x827ba7e)
        at
com.wolfram.jlink.MathLinkFactory.createKernelLink(source
file unknown:line unknown, pc 0x825ad23)
        at com.wolfram.jlink.Install.main(source file
unknown:line unknown, pc 0x820d3ac)

Somebody knows "what's happening?"
Many thanks.

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