Welcome to HBT! Beers with high ABV% will take considerably longer to carbonate. Just a few other questions though...
What temperature are you conditioning/carbonating at? If it's too low it would drastically increase the amount of time to carbonate. The ideal temp is a little above 70F.
Also, did you use the appropriate amount of priming sugar for you desired carb level?
I would assume its just the high ABV% though...If everything else seems in check I'd keep waiting for another week or two and then check it out again. If it's still low there are a few additional option (swirling bottles to resuspend yeast, carbonation tablets, adding more priming sugar, adding more yeast, blending with properly carbonated beer). But before you go down those routes I'd give it a little more time!