Factions and Nightfall

Hi -

My wife and I have both been playing Nighfalls and I recently purchased Factions and created an Assasin / Warrior.

I am trying to work out how to get my character to Nightfalls.

I have searched and googled every combo I can think off but cannot work out how to move from Factions to Nightfall.

I have seen you have to complete a mission then it allows you to ship between the chapters - I am level 13 and just wondering how much further do you need to go ?

If anyone can point me in the right direction it would be greatly appreciated.

Thanks

You need the Quest Sunspears In Cantha from Imperial Guardsman Linro

Here is the wiki link for the travel between campaigns http://gw.gamewikis.org/wiki/Campaign_Travel