PSP Hacking Help Please

I have a PSP Slim with firmware 5.50 and a fat PSP with firmware 3.52 i got a 1 gig magic memory stick which i made using Easy Installer that i got from this site http://forums.afterdawn.com/thread_view.cfm/708959 i got a pandora battery with blue LED lights. But when i still cannot hack my PSP i follow every step. I unbricked a PSP slim with a fat battery i made using a hack fat psp it worked using the tutorial on that link i posted. Is there any way i can hack any of the two PSP. When i put the battery inside my slim PSP nothing happens it boots like a normal battery.