Ford Escape shifter won't go into park

So I recently bought a used 2005 escape a
few weeks ago and I've been having
problems with the shifter. So sometimes it
won't shift into park. It doesn't click in. But
if you wait a minute it will click in and then
you can take the key out of the ignition.
The shifter is in the console. And there is a
button you press to move the knob back
and forth, when it is having this problem
you also don't have to press the button to
va able to move the shifter knob like you
should. It just goes back and forth without
pressing the button