ok first your on pro b8 right well the perm patch is only for 6.20
2 are you putting the iso in the iso folder on the root of your internal memory or on the memory stick if not create the folders name them iso and put them on the root thats among the other folders like psp and so on
and hit select and change the iso driver i use sonynp9
if you would like to downgrade to 620 pro b8 perm follow my vid in section 7 of this mega guide
http://www.pspmod.com/forums/psp-beg...-one-link.html
im using a pspgo in my vid