Package Installer Misbehavior

I am unable to understand and fix the following behavior displayed by the Package Installer. In my application when I press on an 'update application' button, I download from a web

Solution 1:

Would it not be better to let the Android market place app handle the update process of your app instead of downloading and installing the apk yourself in your app?

Your question doesnt specify why you are doing this, if you have a specific reason, do update your question and i will try to have another look.

regards