Android Market - Error While Uploading Apk File

Just now I have developed an application and now I am ready to upload it to Android market, but when I am trying to upload, it shows the following error message: Market does not a

Solution 1:

While developing and testing, you can compile in debug mode(debug certificate).

When your application is ready for release, you must compile in release mode and then sign the .apk with your private key.

The following link gives will help you

http://developer.android.com/guide/publishing/app-signing.html