OK, so you've got Recovery. That's OK. But it might be worth checking to see if you can connect properly with any other devices that have WiFi (your laptop, phone, whatever you've got). If you can't get on with any other devices, it's the router's problem, not your PSP's.

But if it is your PSP's problem, I don't know what's gone wrong. But I have experienced a number of problems with upgrading custom firmwares - including a very strange one with my white PSP, that occurred when I upgraded it from 3.03 OE-C. It wouldn't turn on at all - apart from Recovery mode. I tried reinstalling the custom firmware - nothing. What fixed it was going back to 3.03 OE-C. Nothing really had changed, I just made a perfectly legit update that worked fine for thousands of other users. The next update, however, worked fine - it was just one update that didn't work.

So what I've learned is that if you come across a problem that occurs after updating, and makes no sense at all, the best thing to do is go back to the one that worked, and wait for another major update to come along. So, in your case, I'd advise going back to 3.71 M33 and staying there.

But before that, just check the access point with another device with WiFi. Who knows, it might not be anything to do with your PSP anyway.

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