I just racked 5 gal. of wheat onto 4lbs of mixed barries. My OG was 1.051, the SG when I racked was 1.021 (probably not finished yet). I figured it would not hurt to throw the fruit into the final stage of fermentation. After 2 days of crazy fermentation my SG is at 1.010 and still bubbeling.
If you are not getting any activity from the berries then I might repitch some yeast and make sure there are no preservatives in the fruit.
I thought you were supposed to wait until fermentation was complete before racking to a secondary and adding the fruit? I had heard that if you add fruit before fermentation is done it will greatly diminish the fruit taste during the fermentation process? Could be wrong but I am waiting until my red is at my target gravity before racking it on top of about 3lbs of raspberries...