It's the connector that's causing your problems. If you want to be able to use it with the game pushed down, insert a game, leave it for around 24 hours or more, and that will wear it to your liking, and it will be more like one when the original one came from Nintendo. You said you cleaned your games in your other thread, right?
I do this when I have a connector that doesn't want to work at first.
Did you buy it on ebay? Most sellers say they'll warrant it for 90 days, so you could send it back to them for a replacement if the steps mentioned above don't work for you. A percentage of them are bad from the beginning.
If none of that works for you or you don't want to be bothered, send it back to me. I would, however, strongly suggest that you go through everything that I listed.
"does anyone here know how to fly a plane?"
"STAND BACK EVERYBODY, I HAVE A FAKE ID"