None of the backup managers i have will run my decrypted iso file

I just decrypted the game skate 3 using one the guis for ps3dec and the process went smoothly with no error but when i copied the game to my internal ssd via ftp , no matter i tried multiman or webman or managunz , it gave me the error that the iso is encrypted , also before this since i have cfw evilnat , i tried the on the fly encryption that cobra has on the encrypted iso when the dkey file is in PS3ISO, but that also reached no result. What is the issue here????