  We study the breakdown of fluctuation-dissipation relations between time
dependent density-density correlations and associated responses following a
quench in chemical potential in the Frustrated Ising Lattice Gas. The
corresponding slow dynamics is characterized by two well separated time scales
which are characterized by a constant value of the fluctuation-dissipation
ratio. This result is particularly relevant taking into account that activated
processes dominate the long time dynamics of the system.
