Because, as I said, the viewpad does not have the specs necessary to support flash. If you wanted a tablet that supported flash, you shouldn't have bought this one - it's been said over and over on the web that this one does not support flash, nor will it ever.
I offered you a solution to using facebook chat (use the facebook app rather than using facebook via a browser). I offered a suggestion to possibly being able to play the facebook games (using a browser like skyfire or miren).
You are not going to ever be able to install flash on this device. If that's a dealbreaker for you, then this is not the device for you.