She reveals the truth: Clare Quilty, an acquaintance of Charlotte's, the writer of the school play, and the man Lolita claims to have loved, checked her out of the hospital after following them throughout their travels and tried making her star in one of his pornographic films. (http://en.wikipedia.org/wiki/Lolita)
I guess after tried there needs to be to-infinitive to denote afterward plan to make her star. Why is there –ing object of tried?