Mario Power Tennis Trouble

[V45CH3]

I have the dolphin emulator... and i have mario power tennis in iso. When i open in the emulator it says somethin about compatibility with 60 and 50hz and i dont know what to do... please some help im new in this

 

[Agozer]

The game tells you to choose between 50Hz and 60hz display mode most likely. It's quite common in console games nowadays.

 

[V45CH3]

yeah but i can't do anythin and i also changed the monitor configuration to 60hz and nothin... i cant move or choose the hz mode when the screen apears