fbconnect include not found by xcode

Question

when the following include is added to my project, xcode fails to find it:

import "FBConnect/FBConnect.h"

i have added the facebook src directory to the header include path and the user header include path in the project and target settings.

when i change the include to #import "FBConnect.h" the file is found, but i get a duplicate symbol error when building: ld: "duplicate symbol _OBJC_IVAR_$_SBJSON.jsonParser in ..."

i am unclear on why the initial FBConnect/ is needed for the include, when all the source files are under the src directory, and either xcode or facebook's directions seem to be faulty, as that approach fails

thanks for your help