Feeding problem. Both milk and solids?

My daughter is 11 months old. From her birth, she has been on formula feed lactogen, as her mother was unable to breast feed. We started Cerelac and ragi pudding when she was 6 months old. Over the last week or so, she has completely avoided the spoon which is why we cant give her cerelac anymore. Also, she drinks very little lactogen, like 60-90 ml every 4 hours or so. We have tried boiled rice, mashed apple and banana etc but she takes in very very less of everything. She is active but we dont see any weight gain whatsoever. In fact we feel her weight has actually reduced. She was 3.6 kgs at birth and now around 8.5 kgs. Please suggest. Again i am not complaining about the weight, but why is it she has stopped both milk and solids? We are giving esomac 10 granules morning and carmicide afternoon and evening to rule out griping or colic pain.