Click the down arrow on the Row or Column, and uncheck zero.  You could also
try double-clicking one of the pivots and choose Subtotals > None > OK.

Hope that helps.

Regards,
Ryan---

I don't know if you can hide zeros just for the pivot table, but if you
select Tools >> Options >> View and uncheck Zero values, they will be hidden
everywhere on that sheet (including the pivot table).

Hope this helps,

Hutch