PATH

set the PATH permanently.

Start the system editor.> start-run- sysedit

Go to the window that is displaying AUTOEXEC.BAT

C:> edit c:\autoexec.bat

   c:> path
eg:
 C:>PATH C:\WINDOWS;C:\WINDOWS\COMMAND;c:\jdk1.6\bin

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set ANT_HOME=c:\ant\bin

set JAVA_HOME=c:\Program Files\java\jdk1.6.0\

set PATH=%PATH%;%ANT_HOME%;%JAVA_HOME%