Clutch Master cylinder leaking

I recently had to replace my master cylinder with a new one, however, it seems to leak brake fluid from the top grommet no matter what I do. I have checked to make sure I was installing it right multiple times as well. Also, the master cylinder seems to not gain any pressure either which makes me think that the fluid is not even entering the cylinder. I have already bought two clutch master cylinders and they both leak in the same area. Am I missing something I am supposed to do? Any help is greatly appreciated. (Sorry for the misinformation at the top, my car is a manual).