the quest doesn't start :\

I found the island and the portal
There are a guard and a kajhit outside it but neither of them wants to talk

If I go inside the portal I am moved to a room with a portal to go back, a door closed shut, a table, a book, two chairs and one of those thing used to keep time for musicians
All I can do is go back

I tried starting the quest by console, which made a guy named "haskill" appear in the room
After talking to him, he gets up and goes near the door to open it, but all he does is stare at it
I am also blocked on the chair and cannot do anything, and am forced to reload

After installing SI then activating it, start a game.

Normally, Oblivion will generate a Quest Update for SI after 24 hours (in-game time) has elapsed.

But you glitched the quest with the console command. Now what you will have to do is load a save before you did that, then let 24 hours go by while playing.

the 24 hours have passed already
Actually I think I let more than a week go (done the Knights on the Nine quest-line and some other things)

I have a save from before using the console command anyways

Edit-

Look at this guy's topic
http://thenexusforums.com/index.php?showtopic=65062

He seemed to have a similar problem
I am using one of the many "viking" race mods and I have installed both the race fix and the alternate game start (by ship)
Also I installed the mod After starting the game

Edit 2 -

Just for a test I made a quick Nord, waited 48 hours and nothing happened
Went on the island and encountered the same problems