How to open diplomacy for the pirates? (Empire: Total War)

I have a bunch of sites searched, but nothing found on this topic
And it is very uncomfortable to play when you can't interact with other countries
Sometimes they can throw me a couple of sentences allegedly a peace Treaty, but if I accept, then again to declare war can not because diplomacy is not working
In short, I'd like to know how to open diplomacy, as in all other countries





If who-thread from the modders themselves groping for diplomacy, then I would be very grateful if he sent me a link where I could correct this jamb