Use your suppress formula in the Section Expert for your details section instead of on the fields. Also, you don't really need the "If..then true else false" because your expression already evaluates to true or false. An even easier way to do this would be something like this:
{ITMMVT.PHYSTO_0} + {ITMMVT.CTLSTO_0} + {ITMMVT.REJSTO_0} +
{ITMMVT.PHYALL_0} + {ITMMVT.CTLALL_0} + {ITMMVT.REJALL_0} +
{ITMMVT.PLFPHYSTO_0} + {ITMMVT.PLFCTLSTO_0} +
{ITMMVT.PLFREJSTO_0} + {ITMMVT.ORDSTO_0} + {ITMMVT.SALSTO_0} +
{ITMMVT.DETSHT_0} + {ITMMVT.GLOSHT_0} + {ITMMVT.GLOALL_0} = 0
This will evaluate to True if everything is 0 and false if it's not.
-Dell