Data between screens and null error

I have a boss fight sort of game that has two problems:
1 - when I buy items from the marketplace screen, the data does not transfer well into my actual game screens -- specifically the bullet colors.
2 - every time I run the game I get the error iOS: Runtime error. invalid application. Irritants: (#!null)

Heres the aia file :
BossFight.aia (5.7 MB)