RaspberryPi installation problem

[jch]

I've got a RaspberryPi running rasbian with java installed:

$ java -version
java version "1.6.0_27"
OpenJDK Runtime Environment (IcedTea6 1.12.5) (6b27-1.12.5-1+rpi1)
OpenJDK Zero VM (build 20.0-b12, mixed mode)

but when I attempt to start minimserver I have a problem:

$ java -jar ../lib/minimserver.jar
MinimServer 0.72, Copyright © 2012, 2013 Simon Nash. All rights reserved.
starting MinimServer
Enter command (? for help), or null to exit:
>java.lang.UnsatisfiedLinkError: /home/jch/minimserver-0.72/lib/libohNet.so:: cannot open shared object file: No such file or directory
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
[...]

That file does exist and does seem to the right sort of thing:

$ file /home/jch/minimserver-0.72/lib/libohNet.so
/home/jch/minimserver-0.72/lib/libohNet.so: ELF 32-bit LSB shared object, ARM, version 1 (SYSV), dynamically linked, not stripped

What have I done wrong?