I just started using the SPPP 17 in my Dunlop M-Fil 200 Plus 2006. I was very happy the way it played for probably first 4-5 days (2-3 hours a day), then all of a sudden, the string feels like dead. No pops, feels, absolutely NOTHING!! Is this normal? If you look at the back of package, it says that the SPPP holds the tension better than most strings in the market including the gut. Last 2 days, I was playing with it, and almost all of balls I hit landed inside or close to the service line because I couldn't generate any power, but spins. I am thinking to cut it off, but it's been only about 10 days=20-25 hours of playing time at 3.5-4.0 level.