1-4 scaling in forcefield

Dear all,

I have modified the Dreiding forcefield to include the parameters that I need taken from the
literature. But I can not make Forcite to understand that the 1-4 interactions (both
VDW and Coulomb) should be scaled by a 0.5 factor. I have tried the obvious thing, setting
the COU_1-4_SCALE_FACTOR and VDW_1-4_SCALE_FACTOR in the preferences to 0.5, but it seems that Forcite does not care about this. Any hint?

Thanks,
Miguel.