E field source in EM analysis

[RStoneb]

I am new to ANSYS and am trying to solve some simple EM problems to learn about the program. Specifically, I am trying to model a capacitor in the "high frequency" electromagnetic domain. I understand there are "low frequency" formulations, but the research topic I am working towards is similar to a capacitor but requires computing displacement currents.

Anyway, I model a box and impose an electric field source on the bottom face of my box and a PEC boundary on the top face. The remaining sides are left free.
When I perform a harmonic analysis I get no electric field anywhere at any frequency. I would appreciate any help on this matter. I've included my code below.

Thanks.
cap_w=1. !side length cap plate
cap_d=.01 !cap separation
/prep7
et,1,120,1
mp,murx,1,1
mp,perx,1,1
block,0,cap_w,0,cap_d,0,cap_w
!
!define excitation
!
asel,s,,,3
bfa,all,ef,0,100,0,0
!
!enforce PEC on opposite capacitor face
!
asel,s,,,4
da,all,ax,0
asel,all
!
!mesh the model
!
!smrtsize,4
vmesh,all
fini
/solu
antype,harmic
harfrq,1e3
solve
fini