a bolt not tight enough? or a washer missing perhaps? or possibly the wrong part was sold to you and it doesn't really fit correctly?

Do you have someone to pump for you and you can look at the brake like yourself?

also if the car sat for any length of time (like an hour or more) with the brake hose missing, all the fluid that could run downhill to that line will be gone, so you'll need to do a lot of air bleading before fluid reaches the blead like at all.

look for bubbling fluid at all points where it connects...that's about all I can think of...

Lastly, your post isn't very clear, but you don't have a lot of posts on your account, so I'm taking a guess here (don't be offended) that you may not know a ton about working on your car. If you've never bled brakes before, find a write up on how to do it correctly. Good Luck!