Neck Humbucker wiring question.

[Coup]

I decided to put a Seymour Duncan SH-1n on my guitar along with my standard bridge pick up. The sound i get is fantastic from them both, only problem is I can't have bridge pick up only. In bridge position I get neck and bridge coming through.
If I put the 3 way switch to just neck or bridge/neck together its fine. I've checked that i have wired it o.k and that seems right. The only thing I can think of is that its a single conductor humbucker wired to a diffrent point on the volume pot.
Has anyone else had this problem?

[Deaf Eddie]

We gotta see how you have it wired to tell you ANYTHING about it. Pics would be great, a simple drawing would work, and maybe even just a description would help...

JUST A W.A.G.:
Is the humbucker one of those with a braided-shield type lead? Perhaps you soldered the braided-shield to volume pot, and then soldered the coaxial hot right to the volume pot input lug, Gibson style? That would get you the neck-always-on symptom. You'll have to unsolder the pup's hot conductor from the volume pot's lug (leave the braided shield soldered to the back of the pot) solder on an extension (insulate the junction with some tape) and run the hot over to the 3-way switch. Solder it up to the 3-way as you would any Tele neck pup's hot lead...

[Coup]

Thanks for the advice deaf eddie. Yes it seems i have wired it the gibson pick up way. I'll try doin what you said and let you know how it goes.

[Coup]

Did what you said and now it works a treat. Thanks for your fantastic advice I'd given up on the idea of being able to split the pick ups.