WordPress MU

i have download google map plugin.then save it to wordpress-mu\wp-content\plugins.active plugin from admin.but it not showing.what is next step?

In general:
- please do not triple-post the same question.
- plugin problems usually need to be fixed with the plugin author

Maybe helpful if you told us which google sitemap plugin you're using as well since there's a dozen as run down that debugging script that's mentioned in the readme file included in your wpmu download.