[racket] I can't input anything using keyboard in DrRacket

From: xiaohan song (songatoun at gmail.com)
Date: Thu Dec 2 07:56:28 EST 2010

I am running Ubuntu 10.04.1 LTS on my pc
and I can't input anything using my keyboard in DrRacket
I thought it might be the *.sh file
so I compile the source code myself
But it doesn't work either
Whatever I press, it responses nothing
What should I do ?

Forgive my poor English
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