PSP on USB drawing too much power

[Creebo]

Hey all, I've had my PSP charging off the USB port for a couple weeks now, and I've had no problems up until now. It seems that it doesn't want to charge off anything. When I plug it into my computer it says that the device is drawing too much power, and when I plug it into my custom made Mini USB AC charger (5V @ 2A) it doesn't charge off of that either.

I checked all of my connections, nothing was being shorted and they're all properly insulated with electrical tape. I thought it could be something with the fuse, but then magically last night it started charging again off of my computer. I brought it to another computer and plugged it in and got the same "drawing too much power" as before, and then my PSP wouldn't charge off of anything once again.

Any help would be much appreciated

[bassmasta]

I know USB is 5V DC 500mA ALWAYS, so you probably are giving it too much power. And it should probably be DC.

[Creebo]

But what's really stumping me is the fact that it was working for a while, and I didn't make any changes. And I am giving it DC, the 5v 2A charger is AC->DC

[timmeh87]

when a windows computer says the device is drawing to much power, I have often traced that to a short circuit somewhere on the USB bus.

Does the psp say that it is charging ever?