Touch support is not the same thing as Digital Pen support. A stylus on a touch screen is not a pen its a finger substitute for touch support. Does you Flex 4 support a pen. Photoshop brushes interface with pen and mice devices does not have a touch screen interface. You can not finger paint with Photoshop except on touch devices that support touch like a mouse. Like touch pads that have left and right buttons like mice have. If you have a pen you man hace a configuration ptoblem. Is your Pen support via Microsofi Ink APIs or Wintab APIs.