Hey everyone, I'm having a weird problem and maybe someone has a fix for it. On my PSP I had 3.52 M33-2 installed and I wanted to upgrade to a newer one, but it won't work unless I had version 3 or 4, so I installed 3.52 M33-4 and everything work on my PSP and in the system info it shows the correct firmware version. But when I try to install any newer firmware it says I need at least 3.52 M33-3 or 4, which I have. I really don't see why it won't work. I tried 3.71, 3.80 and 3.90... I hope the good community here will be able to help me, Thanks! Oh I forgot to mention my PSP is a fat one purchased at launch, it was firmware 1.5 from the start.