Running a .exe file from server side code

Hi,
I am trying to call a .exe file using server side code.However I keep
getting this error:

error===access denied (java.io.FilePermission <<ALL FILES>> execute).

I even tried to change the security permissions of the file by
changing the java.policy file but it still gives the same error.I have
also tried to place it under /war/WEB-INF but in vain.
Can someone help me with this?

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