a lot of my friends uses psp and when the trial is over,they just download it again?? wen i try to download it again it juss doesnt work... can somebody help me??

try making sure all the files for psp are deleted. once i had a photshop tutorial too and dLed it again and worked.. but third time no. thats why now i have a permanent one

They might've used a program to make the trial never end. Ask them, or buy the program.