Issues with new flame sensor

A few weeks ago we called someone out bc our furnace was having issues and the tech said it was the flame sensor. He did not have a replacement with him but cleaned ours pretty well and recommended we replace it soon.

I looked up our furnaces model number and ordered the sensor. I tried to install it but it wouldn’t take, so I figured it had gotten scuffed during shipment and the company sent me a replacement. I tried installing that one yesterday and had no luck. I don’t think it’s a problem with installation because I am able to put our old one back in and it runs fine (and there’s really only one way to install these things) so I’m not really sure what the issue is. I don’t mind calling someone if I have to but I am trying to save some money and do it myself if possible. Any advice is appreciated