Hi I am new to MFS 2020 and I just recently downloaded the headwind airbus A330 and I just did my first flight from London to Tampa and when I got up to my cruising altitude, the auto pilot wanted to keep climbing and started to veer off of course, and I could not get the autopilot to do what I had put into the autopilot my Simbrief went into the fmc and I had a good route. I don’t know if the atuo throttle worked. I tried to put it on toga and it worked for a minute, but then it went back to the same thing if anyone knows anything I would love the advice thank you.