How To Hack Ds9490 How To Slow Down JNES Emulator?

How to slow down JNES Emulator? - how to hack ds9490

I am working on a hack Mega Man IV for a few days and had no problems with the tests so far. When I hacked ROM of JNES open, plays music with 150% speed, and play a little faster. It was shortly after the addition of an unedited MM4 ROM to the folder that contains the editor and edited ROM. Controlling the frame rate, so how can I solve this problem?