Make sure you got enough fluid and when you bled the system dont let any air in. Have a person push down the pedal, open valve real fast, and close it. You have to do this many times, inorder for the air not to get back in. After you bled it pump the pedal a few times. I just changed my clutch too, and thats what I did. If that doesnt help maybe you have a bad slave cylinder?.. Good luck.