Then you aren't using it correctly.
Plumbum doesn't chelate it helps to aleviate the symptoms and also helps to mobilize chunks that are bothering you.
Taking that much 6c will what all Homeopathies do and that is make you feel worse due to immune reaction against Lead.
We don't do strict Homeopathy here, we simply use it as a tool in the overall protocol...or as Andy Cutler put it;