If the a/c is rolling on you, you have either too much or not enough rudder in. Most likely it's not enough. I can't emphasize enough that if the stick is not straight in you hands your rudder is not applied correctly. Someone said look at your thumbs, they should be more less level with each other. Step on the downside to bring them level then trim off the pressure with rudder trim when you have time. Don't be in a hurry to reach for trim. It can be a distraction. Do it when you are fully stable.