I followed the readme for installing the 3.40OE firmware. When it was installing I left my PSP on until it had finished installing. When I came back to it it had turned off. So I turned it on and I looked at the Firmware in System Information and it still says it was 1.50. I tried installing it again but as soon as it got past the PSP flash to indicate I was playing a game it returned to the XMB. Does anybody know what happened?