Problem with Pirates

Hello,

my english is not the best, but i hope you can help me.

I attack the pirates, all okay.

But then i can´t more attack more??

He make peace with me!?!?

I have make a singleplayer game and a multiplayer game, at two games make the pirates peace with me.

How, i can attack him? How i can cancel the peace....? i don´t would like cooperate with the pirates in this system.

I don´t have found a button for cancel or make war with him : /

need help... plz.

thanks.