try holding the power button up for 10 seconds. this resets the psp (but i think this is in the psp's manual somewhere).
btw: if you read the eloader readme it states not to use the home button in homebrew. you should use R1+L1+Start for a short time to go back to eloader, but that doesnt work on my eloader (at least in most homebrew apps).
instead it turns the psp off.
