Running applications

I have just installed the latest ATVFlash on an updated first generation ATV.
I think I updated to 10.4.11 Combo via Nito ( how do I tell?)
I am able to transfer files to the ATV.
How do I get apps to run. My TV just goes blank when I click on the application. I tried Calculator.
Any help or suggestions appreciated.

Well, I can run FireFox so the program is working.
But what about other apps. (I have installed those in the Maintenance section except Adobe Flash which I am working on.)
Can one get to the Finder?
Sorry for such basic questions.