in reply to Problem in downloading WriteExcel and ParseExcel

If you're asking for help you need to tell us exactly what went wrong. How do I post a question effectively? explains how best to help us to help you. Regards module installation, if you download and extract tar files manually you will also need to do this for other modules which your target module is dependant on. the cpan tool (others are available) does all this for you:

cpan Module::Name