Carriage Won't Move on Smith-Corona Enterprise 2?

I received a Smith-Corona Enterprise 2 typewriter from my grandparents that has barely been used. Everything works fine on the typewriter when I plug it in except the carriage. I have absolutely no knowledge on typewriters, but I did some research and tried every solution that I've found, but I still cannot get the carriage to move unless I do it manually. The lock button is disengaged, it slides and moves flawlessly manually, but it will not move when typing.

Can anyone tell me what Im doing wrong?!
The carriage moves perfectly when I press the backspace key but will not move for any other keys/space bar.

Thank you!

Note: the image is from google, but exact model.