  We analyze the contribution from excitation of the $(q\bar q)(f\bar f),(q\bar
q)g_1...g_n(f\bar f)$ Fock states of the photon to high mass diffraction in
DIS. We show that the large $Q^2$ behavior of this contribution can be
described by the DLLA evolution from the non-perturbative $f\bar f$ valence
state of the pomeron. Although of higher order in pQCD, the new contribution to
high-mass diffraction is comparable to that from the excitation of the $q\bar q
g$ Fock state of the photon.
