Problem: Application not installed

Hello,

I am reading a book, Corona SDK Mobile Game Development, by Michelle M. Fernandez. I have followed the instructions carefully to deploy a small app (Hello World) to my Samsung TAB (2.2.1) via Gmail. Upon installing the app, I got message “Application not installed.” I am using the latest trial version for my evaluation.

What do I miss something?

Your help would be much appreciated. Thank you.
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