Reprinting old TimeSlips

SOLVED

I created an invoice, but never sent it to LEDS format and I cleared the invoice from the billing stages.  When I go to the "SLIPS" tab I can see the timeslips entered, but when I go to recreate the invoice the timeslips will not show up and only a "prior balance" shows on the invoice.  How do I get timeslips from the prior invoice to show on a new generated invoice.