Thanks biohisham for wonderful explanation. I did step by step same what you mentioned. 1st thing Earlier also I used the PPM command on the dos promt and graphical package manager used to popup but the package Win32-GuiTest.ppd is not listed in the package list. 2nd Today I tried ppm-shell.bat after that it showed C:\Temp>ppm-shell.bat ppm 4.06 (ActivePerl 1006) Copyright (C) 2009 ActiveState Software Inc. All rights reserved. Then I tried ppm> install Win32::GuiTest Output was: No missing packages to install Does it mean that Win32::GuiTest package is already installed in my machine ?. Thanks a lot