Anyone Downgraded yet from 2.71 to 1.50

[NayNay1991x]

hi, its very possible to downgrade from 2.71 to 1.50 using a programme called Downdater271 i dont kno and why it isnt working any ideas... i go to PHOTO and i get the red screen which is normal and then the PSP turns off and doesnt do nothing poeple using downdater have not had 1 Brick yet you will get a brick if your using somekind of mainboard with a number of TC or something