  In this paper a calculation for the diffractive structure functions
$F_{L}^{D(4)}$ and $F_{T}^{D(4)}$ using an eikonal approximation is presented.
A modified version of the model of the stochastic vacuum that includes an
energy dependence is used to calculate the scattering amplitude of two Wilson
loops which in our approach describe the color dipole interaction. Numerical
results are presented in the $\beta$ region where the non-perturbative effects
are expected to be large. The DIS diffractive cross section is also discussed.
Our calculation for the diffractive slope in $t$ is in good agreement with the
experiment.
