Radiator push lock hose trouble going back on?

Hi, I am replacing the upper radiator hose and I got one side connected to the radiator on. The other side is extremely difficult to go on and no matter what I do or the amount of force, it simply will not snap in to lock the push lock into place. Any advice as to why this is so difficult or maybe another issue at hand? The grooves and part are identical to the hose that was previously on.