It could definitely be the dosages were too low to get results. Especially if you have cycled before. But, if you've already been on for 7 weeks, I wouldnt recommend you up now and keep it going for another few months or anything. Like I said, I would finish this cycle, do your pct...then do it right next time with higher doses. Talk to the bros here, they are here to help.
If your strength has gone up but your weight hasn't, I would predict your diet needs some major work. Up the calories.