Trying to update an Android application , but having no luck because of problems with the keystore.

Question

Hi I recently published an application for Android in the Market.

Now, I'd like to publish an update, but I'm having a long argument with my computer and keystore about this option. The version:code and the other thing they want you to set, are set.

I don't want to change the numbers , because we'll loose about 30 hours of work time.

The error : jarsigner: chain not found for: ALIAS. channel2cert must reference a valid KeyStore key entry containing a private key and corresponding pub