Unlucky about the problems..
Can you be specific about the psp firmware version...and psp type for that matter (phat or slim) maybe that you installed wrong type of homebrew slim instead of phat and vice versa.
SOMETIMES THIS WORKS,,,,,
Try backing up your ms pro duo to your computer,
Then format the ms pro duo in the system sub menu,
Move psp contents back onto ms pro duo...
Try Homebrew
If this doesn't work try "reinstalling"(1) the emulators...
(1) being redownload and put on mem stick.
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