It’s probably stuck trying to look for updates. It should know that there is no Internet connection available, but it may be that the timeout period is too long.
It may also be related to the problem where it won’t see any updates or emitter libraries available on OS X (Snow Leopard only?).
You should turn off the “check for updates” option in the preferences if you’re not going to keep it connected to the Internet.
Alan.
http://www.wondertouch.com