Just to add to this; I played around with the pickup height. The one in that pic is too high by my experience.
you need to drop it back a bit and adjust the neck pickup so they have even output when soloed.
I think at least part of your problem lies here.
thanks for the tip .
i pushed the bridge pickup down , and it still sounding Metallic . Now the volume output seems to be lower also ? So the bass loses volume by pushing the pick ups down ?!!!