Hi All, I just installed the Sketchbook Express for FREE from the Mac App Store. Its a very good app and they claim that it is optimized for pen tablet.. But when I tried working with the Wacom Pen I have, it is not inputting any of my strokes. It does recognize my keystrokes, but when i lift my pen off the tablet, everything I input using the pen disappears. Its really weird. It works fine with the mouse though. Can anyone let me know what could be wrong? My tablet works really well with Acrobat without any issues.. What could be wrong here ??