how to install loadUI-Agent on ubuntu-server(EC2)

hello
i want to install loadUI-Agent on ubuntu-server how to install ?

i want to execute test case on EC2 with distribute test i try to execute test with two window instance with distribute test but not able to generate required load on windows so i want to run test case through distribute Agent on ubuntu-server but not able to find how to install process of loadUI-Agent on ubuntu-server

how to install loadUI-agent on ubuntu-server ?
why my window instance with loadUI-agent not able to generate more then 100 req/sec
when i increasing request,request will be discarded. so any specific configuration required for windows ?

error

java -version
java version "1.6.0_20"
OpenJDK Runtime Environment (IcedTea6 1.9.13) (6b20-1.9.13-0ubuntu1~10.04.1)
OpenJDK 64-Bit Server VM (build 19.0-b09, mixed mode)

sudo sh loadUI-Agent-2_0_0.sh -c
Unpacking JRE ...
Preparing JRE ...
loadUI-Agent-2_0_0.sh: 335: bin/unpack200: not found
Error unpacking jar files. The architecture or bitness (32/64)
of the bundled JVM might not match your machine.