Rikiya,
You are running it in magnified mode!
Tap-hold the FreeNoteQT icon and uncheck the magnified box.
The same holds for any app that starts in portrait mode (and greys out the rotation option).
Stu
It took me a while to figure that one out as well. At first I was assuming that I was installing apps that would only work on the 5500. As luck had it, I noticed a post about turning off the magnified mode. Now I check the mode of every app right after it\'s installed and had no problems since.