I need to find out how curses can be broken.

Answer:

Through the power of Jesus blood, and through prayer and fasting.

Set a time to pray and fast for a period of time (either a couple days straight or one meal a day for more days). Everyday get in the word, pray without ceasing, and call on the power of Jesus name and His shed blood!

The curse will be broken and as you praise and worship God it will fall from you just as the chains did from Peter and others in Acts when they praised God while in bondage.