just dance 2015 have lag when dancing

[iury900]

i have dolphin wiispeak 3.5 dual core 2.20 2 gb ram and 80gb hd my system is x86 but i have lag with audio when select the music and dancing


dancing is 17 fp and low and select music is 21 to 15 fps

i configured the dolphin but nothing

i see videos with i3 2.20 and the game play smooth
]
my game is pal euro

i trying download the ishiiruka but no have x86


someone can help-me ?