Expansion pack without internet connection

Hello,
 

I upload my application to the store and I identify a problem. I explain myself better:

If I download from the store my application, I can observe that download both the packet and the expansion pack; after the installation if I remove the internet connection from my device before the first launch give me back that error:

As long as I launch the application without connection for the first launch give me back that window. (Should not appear as the expansion pack is downloaded from the store.

If I put back the connection, the application start without problem, and the next launch both with connection and without connection start without show that window.

Why show me that window? How can resolve that issues?

It’s happening to some of my client, and it’s costing me 5-6 one star reviews.

Hope will you help me.

Regards,

Roberto