I am having trouble upgrading my firmware from 3.52M33-4

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I am trying to upgrade to the Latest M33 version, 3.90M33-3, I put the floder in game on my psp then put the renamed 3.90.PBP sony update in there also, the update appears on my memory card and when I click on it and it unpacks my files, and says please wait I have tried it with a full battery and let it go till it ran all the way down but it just said please wait, I also tried getting the update wirelessly but still had the same problem.

If anyone has any ideas I would really appreciate some help thank you.

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NVM figured it out had to change to 3.52 kernal if anyone else has the same problem