Edward Low // pirates quest problem. please help

[alphablue07]

sorry, im still new in this game. and i found myself stuck in the pirate's line quest.
ive been told to chase edward low, they said he's in bermuda.
When i got there, i asked the tavern's bartender and the shipyard person said that edward low is in the Residence with Jackmann.
when i spoke with Jackman suddenly 3 pirates came up and attack me.
the problem is : i cant kill them. i dont know what to do im stuck and confused. need help please

 

[Talisman]

Walkthrough of Pirates quest line is here -> http://forum.piratesahoy.net/index.php/topic/16368-pirates-quest-line-google-traslation-italian-english/page__view__findpost__p__374630

When you talk to the Bermuda shipyard owner there is a trap in the dialog - if you say you are a friend of Low you will be sent to Jackman, who will attack you because Low has stolen his ship ( it looks like you fell into this trap )

Instead when talking to Shipyard owner say you want to kill Low - when you go to Jackman he will offer reward to you to kill Low - then go back to the tavernkeeper who tells you where Goodley is.