99 Eclipse A/T shifter won't go into park

[BoostedSOHCkthx]

Hey everyone,
I'm new to the Mitsubishi world. This weekend I replaced my wife's heater controls (the knob controlling fan speed broke). So I had removed the dash blah blah, had the controls replaced and reinstalled everything. When I put the shifter back on, I can shift it out of park but when I go back to put it in park, it does not engage. So I can't remove the keys. As soon as disassemble the shifter and pull it up a tiny bit, I can hear the transmission engage. Does anybody have any idea why it won't go into park? I appreciate any help.