Make sure you are using the latest driver. Also not sure if this will help but try setting your tablet to recognition mode. This will cause your tablet to send much more data(it may also fix a lot of other issues such as low quality strokes and jaggy sensitivity)
My settings panel looks nothing like that unfortunately, all I get is this crap: My control panel and driver version are 6.3.9w3 which is supposedly the latest. When I was using my Intuos 3 my config panel looked like yours and I was able to edit the curves, it wasn't until I installed the Pen and Touch CTH-680 that it…