I brewed a extract Belgian Golden Strong Ale which I put on a yeastcake of a tripel I had just bottled. I added a pkg of Safbrew T-58 after 3 days. Initial ferm was very vigorious and got a second little kick when the T-58 went in. OG was 1.085 and FG 1.012. It was a 5 gal batch. I used about 3/4 cup of corn sugar to bottle about 40 bottles of beer. After sitting for 4 weeks at around 75 degrees, the beer is flat. I shook the bottles good at about 2 weeks. Any ideas? Was the yeast from a high gravity beer simply exhausted. I'm thinking of mabye trying to uncap and put a few drops of fresh yeast in each bottle from a syringe or something.