Unhappy [Q] Help. Xperia P (HonamiMoonwalker 7.5)

Hello.. When i flash HonamiMoonWalker v7.5 everything is ok.. except for the walkman that is to laggy..
did i do something wrong? i follow developers instruction very well.. i flash it 3 times already clean install and follow developers option..
music is still laggy.. what should i do..? please help.. and thank you...
xperia p lt22i..