[mso] Access SQL

What's wrong w/this SQL?

I'm trying to get the most recent email address according to the one up
value of the CID. If I have a person with more than one email, I'm
getting them all instead of just the one I want.

UID is Unique ID
Commo is the name of the table
Ctype is the type of communication record (email, telephone, pager)
CID is the one up number for communication record unique ID

SELECT UID, Number
FROM Commo
WHERE CType=3D3 AND (SELECT
max(b.CID) FROM Commo b WHERE b.CType=3D 3 AND b.UID =3D Commo.UID
AND b.CID =3DCommo.CID);=20
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