I'm not too keen on guitar repair, and not the best at troubleshooting so forgive my naivity, but I have a slight problem with my epi lp custom. On the 15th fret, whenever i do a bend on the B and high e strings, the note just kind of dies out in a very unattractive manner. ive checked the rest of the frets and its only on this fret that the problem occures. i can not bend the string hardly at all without this occuring. Does this mean that i have unlevel frets? or is there another problem i am unaware of? Any help would be appreciated as i know little about repairs and whatnot, thanks in advance!