hey, ive got a problem. ive just tuned my jackson down to C# tuning, and now whenever i hit the 1st or 2nd string on the 8th fret i get a crappy tinny/dull echo sound. the guitar has a floyd rose and a new set of strings on, im just wondering if anyone knows what is causing this and how to solve it (ive tried breaking the strings in by bending them and pulling them loads, but this hasnt worked)