Cannot publish app to google play

Hi ,

I am getting the following message while trying to upload my APK file to google play :

"Your APK's package name must be in the following format "com.example.myapp". It may contain letters (a-z), numbers, and underscores (_). It must start with a lowercase character."

I have changed the package name on the manifest file to com.myname.mygame , but it didn't help,

Thanks,

ELI.