Update app on Google Play

Question

I have recently uploaded an app in Android Market. I have fixed some of the issues and now trying to upload the latest version. I am sure i am using same keystore , same packages, higher version code. When uploading, it shows following error:

The apk must be signed with the same certificates as the previous version.

EDIT: I have regenerated apk with same keystore, this time error changed:

The server could not process your apk. Try again.

Answer 1

There was some problem with the Google's server. I changed my package names and uploaded it as new and fresh app.