Naruto Clash Of Ninja Revolution Help!

I can't unlock mission 21. I have completed mission 20.
What must I do :-\?!

well what i reccoment after trying it 100 times is 3 steps based ill explain:1: get of your chair walk towarths you wii(i think)
2: unplug every kable and lift the wii
3: scream ''AAAAAAAAAAAAAAARGHHHHHHHHHHHHHHHHHHH'' AND HOPE YOULL TURN INTO A SUPER SAIYAN WITH THE POWER TO bigbang kamehameha the wii with the naruto disc inside.if that doesnt work try a walktroughi swear i hate this life im gonna rob a bank!!
oke everybody on the floor!!! you come here!
*takes a girl hostage* if anybody moves 1 inch
ill kill myself and then her!!!!!!~~dark saiyan~~

lol, I finished some battles and it unlocked :)!

cool grz :)