If you get your calories too low, also, your metabolism will slow down. Also, I've heard people say to eat more simple carbs with ALA. Can't vouch for it, just heard people say that's the thing to do (since the ALA can just pump those carbs into the muscles).
The best thing to do is definitely start off low carbs, and raise them a little bit at a time with the ala and see if you're still making progress. I personally was able to lose 110 lbs (from fat bastard to ~10% body fat) eating 150-250g of carbs a day (very little fat, eating 20-40g of carbs per meal and 30-45g of protein, shooting for 6 meals of approx 300-400 calories each).