Dend Stalks and new growth

[tfields]

I have had this dend for almost 18 months . In winter it was in a east facing window ,and sprung up two new sprouts .I re potted into two .All the old leaves fell off .The new ones look good but it seams to have quit growing .Will the old stalks get new leaves .And what can I do to start it growing again . I have it in a south west facing window some what shaded. And water about every 12 to 14 days .