I got my 50 pieces with the star and went straight to the machine in the lemonade factory.

I gave the machine my 50 pieces and he tells me the legend. After the legend was told, the message "legend of the star" failed appears on my screen. WTF?!?!?

How can i get this trophy??????

you might want to save and reload - I've read here that sometimes this quest glitches and the save-reload trick resets the correct flags. idk the truth to this though.

Edited: Nevermind

I and everybody else need 50! Believe me!

Reloading/restarting doesn't work. "Legend of the star" still fails.

Okay. It's no bug, glitch or whatever.

It's normal that "legend of the star" fails and when you finish the following quest you get the trophy.

how do i get to the prize vault to collect my prize? i cant seem to get to that room, cant find a door to get me there, help please?

http://fallout.wikia.com/wiki/A_Valuable_Lesson.

You need climb to the top floor and jump through a hole in the floor to reach the prize room.

Pew Pew!

The Quest has to fail and "A Valuable Lesson" begins, I completed valuble lesson quest and got the Achievement called "The Legend of The Star".

I love how this quest ends.......it's so appropriate.