Sure, no problem.

If I just turn off my Palm Zire without leaving the game, the registration code will hold...but, if I leave the game, usually by tapping the home icon on my Zire, then re-enter later...that's when I have trouble.

Whenever I re-enter the game, I tap on the Village Sim icon & the first screen that pops up is always the map screen. As soon as I tap a spot to zoom in, I immediately get a message that says: "the unregistered version is only limited to 7 villagers, so please register". (I currently have 8 villagers) As soon as I go the the menu & re-enter my registration code, the game is fine again...that is, until I decide to exit the game again.