Sometimes won't go into gear fiesta

[riverrat321]

Hi guys, I have a fiesta zetec about a 2010 model with the auto gearbox. It's done 90,000 ks. Sometimes when I put it into drive it seems to not engage. The lever moves no problem but it's like it's still in neutral. When I take it back to park or neutral then back to drive again it works. Any ideas?