OK - If you joined one Freeport before the quest then you need to leave it first. Here is what you can do.
Click the EQ button to get main menu
click socitys (ok i spelled it wrong shoot me)
find your old one then click to leave it.
You chould be able to join any starter one you like I goto Willow Wood my self.
You should also note that if you had a house in Freeport and did not get rid of it you will need to. I just whent bcak to freeport and left the house normaly, had to sneak around gaurds but not too hard