Map Works When Debugging Android App, But Not When Downloaded from Market

I have published an Android app to the Android Market. When I test the app on my device, installing it from Eclipse, the Google Map that is contained in the app loads as expected. However, when I download the version of the app from the Android Market, the map ti开发者_StackOverflowles do not load.

Any ideas about why this is happening?

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You should use Google Map API key for Release keystore and signed the application with Release key .