Claymic I have the same problem, on insulin for 9 or so weeks, followed low carb, for What I wasn't eating it should have dropped off me, I reckon I was storing water and putting on at least 1 lb a week maybe more. I'm on the 4 injections a day regime, long acting at night, count carbs for short acting during the day usually between 8-10u a day.
I must be really and truly insulin resistant. Finally enough was enough and I asked the nurse what to do, couple off option one of which was victoza, I'm glad I decided to try it, side effects ive had 3 short bouts of nausea and that's it. My long acting I've reduced to 19 and yesterday only had 5u of short acting.
Nurse said it takes a while t o settle with insulin, but I can't afford to wait and put more weight on. It might be a bit too early for you to go on it yet, but victoza has properly stabilised my bg.