Wacom tablet and painter 2019 some brushes are not working


i downloaded the trial of painter essentials 6 and then painter 2019 and in both cases only a few of the brushes worked when i used my wacom. When using the mouse pad on my laptop they work fine but on the tablet most brushes seem to just come out blank or make small smudges when going over other lines of paint. im using windows 10 and an intuos 5 touch tablet with the latest driver installed. i have tried using the previous wacom driver and reinstalling my wacom. Their customer support ran me through all the settings to change and check that they could think of and the tablet works fine otherwise so they said it must be a problem with painter but i just cant figure out what it is. please help!!! xx