Sorry, Sleepyduck, but your cooking wine is past it's prime as well. Wine that is opened should be consumed within a couple of days (unless it is a dessert wine, like port, which has already maderized). If you want to cook with wine, a couple of weeks old is generally about as long as you want to go. Basically, if you wouldn't drink it, you shouldn't cook with it either. At least this gives you a good excuse to go wine shopping
Pick up a bottle for you and one for the kitchen!