I have a slight problem with my ECSK7S5A. I've been running SDR ram on it as long as I've had it (maybe 6 months), and I recently upgraded to DDR ram. Problem: DDR slot doesn't work! How was I supposed to know when I first got it? Anyway, I think I want to RMA it, but I don't have a friggin' receipt. I lost it. What do I do now? Can I use another person's invoice? This totally sucks, because I couldn't know if my DDR slot worked or not because I didn't have any ram. Now that I have DDR ram, I find out it doesn't work. Someone... anyone... please help me!! THanks 