[Resolved]Problems running soapUI on 64 bit ubuntu

I installed soapUI 4.5 Pro on 64 bit ubuntu 11.10. When I try to run it, I get this error:
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= SOAPUI_HOME = /opt/SmartBear/soapUI-Pro-4.5.0
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Exception in thread "main" java.lang.UnsatisfiedLinkError: /opt/SmartBear/soapUI-Pro-4.5.0/jre/lib/i386/xawt/libmawt.so: libXext.so.6: cannot open shared object file: No such file or directory

Why is it referencing i386? Do I need to add an option to the soapui-pro.sh startup script so that it knows this is 64 bit, or am I missing some required library?
Thanks,
Leila