You have to have the FMC set in the right mode, otherwise this little beauty will spool up the engines while you're trying to kill them when landing.
Read through the manuals for a full explanation.
Additionally, my opinion is that the flight model is garbage, especially wen mixed with the jerky FBW logic they have going here. Don't try to hand fly this plane - just use the autopilot and systems.
Good procedural sim, crappy hand fly sim
Works well as long as you follow all the checklists, but you won't get far just pushing the throttles open and laughing madly.
I ran through the tutorial section in the manual a few times and kept it with me to double check for a few more flights.
Started out hating her, but she grew on me and now I know the checklists, I like her very much.