I have used that effect few times, and It has never gone like that... It is pretty simple effect, try make it again from scratch? or try it with other tutorial?
ure gradient is wrong tahts why you should have to foreground-to-transparrent gradient. now the whole gradient is black-white. thats why the text disappears. make it again from scratch. jsut try it a few times, take a good look at all the settings at the pictures that are provided.
k i think i know whats wrong, try using a diffrent tutorial it looks like you have a black box underneath the shine get rid of that, turn your text black and it might work