Here's the set up- 2 pups (1 neck, 1 bridge. Similar to a jazz bass) with controls v/t with a 3 way selector switch wired neck/both/bridge. Both pups work fine without any tone rolled in. With the bridge solo, the tone works fine. With the bridge+neck on, the tone only affects the bridge pup. With the neck solo, the tone doesn't work at all. Whats my problem?