Are you having trouble with new inventory items or changes not being sent to the Point of Sale (POS) ?
Tip:
Trigger the item Re-Sync to the POS. This will flag the item to be sent to the POS during its next scheduled sync.
Trick:
From the Inventory Items screen, select the problem item(s), then Right Click. Choose "Trigger Item to RE-Sync to POS". After the next sync, test the item again.