If your zip file is available online, please post its url, so forum participants can have a look and find the root cause.
It will most likely have to do with one of these:
- wrong configuration
- wrong directory/file structure
- incorrect deviceready event handling
Here is some feedback:
1. Make sure your config.xml and index.html are both in the root, not in separate directories!
2. From config, remove any FEATURE element, since PGB doesn't use these. Include the proper plugin instead.
3. (unrelated) Your Android splashes won't show, because you are setting compound qualifiers in the density attribute. Use the qualifier attribute, instead. See the Icons and Splashes section of the PGB docs.