hi guys i have recentley fit a set of seymore duncan allicino pro pick ups in my les paul standard wired to the instructions but when is play the guitar it sounds terrible it sounds ok when i play a single note but when i play a chord it seems to sort of warble the soud is not clear .also i seem to have a earth problem im getting a buzz which goes when i press the bridge i have double checked the wiring diagram the wires are as in the diagram .