Apple Packaging?

Ok, so I finally broke down and got an iPad for development purposes and I've followed the instructions off a few tutorials about how to package it up to work on the development iPad: http://www.adobe.com/devnet/air/articles/packaging-air-apps-ios.html

However right before sending it to the iPad it asks for the .p12 password. No password was ever set - but a blank password doesn't work. Re-did the .p12 with a password - and the pw didn't work, even tried a p12 for android with a known password and it wouldn't take the password.

What am I missing here?

Thanks,

Matthew