GFCI on Timer not providing power and tripping 20a breaker at panel when RESET

Ok, very tired and its nearly 3am.... so I apologize if I don't catch everything you guys need to help me out, but here goes. New Christmas light outdoor circuit - 4 outlets total 12/2 awg cable 20a normal cutler hammer brand new breaker that fits in my panel 1 outlet = GFCI that will work for 15a and 20a loads 3 outlets = Normal receptacles 1 quantity = T103 40Amp commercial Intermatic mechanical timer 4 outdoor enclosure wet protective outlet boxes with weather gaskets and outlet face spring action door covers; outlets mounted under the soffit and 1 (the GFCI) mounted on and into the brick wall just outside the garage.