  The violation of the Fluctuation-Dissipation Theorem (FDT) in a
two-dimensional Ising model with both ferromagnetic exchange and
antiferromagnetic dipolar interactions is established and investigated via
Monte Carlo simulations. Through the computation of the autocorrelation
C(t+t_w,t_w) and the integrated response (susceptibility) functions we obtain
the FDT violation factor X(t+t_w,t_w) for different values of the temperature,
the waiting time t_w and the quotient delta=J_0/J_d, J_0 and J_d being the
strength of exchange and dipolar interactions respectively. For positive values
of delta this system develops a striped phase at low temperatures, in which the
non-equilibrium dynamics presents two different regimes. Our results show that
such different regimes are not reflected in the FDT violation factor, where X
goes always to zero for high values of t_w in the aging regime, a result that
appears in domain growth processes in non-frustrated ordered systems.
