Do you give her foreplay and how long? Penetration alone is not going to lead her to her wonderland/heaven.
Give up! Run for the hills! I'm kidding. From what I understand, and women tell you it's not true, that take it from them, swear up and down etc... but orgasm from penetration is a myth. It's all clitoral. That's the way they're made and Kinsey and Grafenberg are baloney! So aim for you know where!