Earlier today I attempted to replace the pickups in my Fender Starcaster HSS strat with a GFS Power Rails in the bridge and two GFS Lil Killers in the middle and neck positions. However, all did not go as planned:

The neck humbucker sounds very dark and jazzy and the tone control has no effect on it. It always sounds as if the tone knob is all the way down to one. This is strange because I did not do anything to any of the potentiometers, the only unsoldering/soldering I did was to the 5-way switch. Any suggestions as to what I did wrong and how to fix this problem? Thanks in advance!
Thank you! The problem appears to simply be bad components (cheap tone pot). It appears to be all taken care of now!