Is Size Jitter set to Brush Pressure in Shape Dynamics?
Are you seeing the little pling character (exclamation mark) next to Size jitter? If yes, then it is a driver issue, but you might need to try a few strokes with the pen so that Photoshop knows it is connected.
If there is a Ugee specific forum, I'd ask there as well, as we don't tend to do well with them over here.
That's the problem, the entire section (including the part in the green box) is completely grayed out and cannot be changed; it just isn't allowing me to change things and is currently set to "off" I have tried the pen and it didn't change anything sadly . I will try a Ugee forum as well as emailing Ugee to see if they may have seen this problem before.