I used a lot smaller picture as a reference. So even you got it wrong.

Please post your reference.

I'll try to fix it up a bit :)

not a bad start ;) 

Main thing to work on here would defnitely be your AA, which has a ton of errors. First, as your lines get longer (near the top of the door frame, AA bits should be longer to achieve the same smoothness. Also, your AA on the edges of the blue light on the floor is just banding (3 layers!), which only blurs the lines there. There is a similar issue with the AA on the person himself.

edit - http://i.imgur.com/R1js2En.png