i juz bought a mark2 8gb from lelong, but the problem is my psp doesnt seem to be able to read it, initially it was 3.90m33-2, n since it cant read, i upgrade it to 5.00m33-3, but it still cant read it, but i tried to read it using another psp(3.90m33.3) it can read, i tried format the ms using that psp n even tried to reset the flash01 of my psp in the recovery there, it still cant read the ms. anyone here face this b4? anyone have any idea what went wrong?

Ya, my computer can read it. my fren's psp2006 with version 3.90m33-3 can read it, but juz my psp2006 5.00m33-3 cant read it