knitting noob

[sud-pacifique.livejournal.com]

i'm knitting that scarf for my boyfriend as a late christmas present.

see how the edges are curling in? is that normal for that pattern or is my technique wrong? i should also let you know that for that photo, i layed it flat as best i could. it normally curls all the way as to form a tube. =/

how can i prevent that?