1998 Eldorado Shifter
 

I purchased a 1998 Eldorado a couple of months ago. Not long after we purchased it the button that you need to push in to allow you to put it in gear started sticking. Several times now it has been so hard that I feel like I am going to break it trying to break it. Has anyone had that problem, if so what is the remedy??
Thanks in advance for any help..............