libpq.a out of date

can someone help me with this error.

I am trying to learn how to work with libpq on Mac OSX (10.1.4) in Project 
Builder. I think I am setting the lib path and includes correctly (finally).

postgresql version 7.2.1

/usr/bin/ld: table of contents for archive: /usr/local/pgsql/lib/libpq.a is out of 
date; rerun ranlib(1) (can't load from it)

Thanks,

Ted