CatalogVersion syncronization issue during automated syncjob

I created a Multithreaded Synchronization CatalogVersionSyncJob which synchronize the product catalog(Staged) ----->(Online) and if i execute my job by clicking on "Synchronize Catalog Version " option from HMC(manually) then it properly synchronizes my products from staged to online. But if i execute my syncjob by setting a trigger(without clicking on "Synchronize Catalog Version " option from HMC), then it is not synchronizing my products from Staged---->Online. Can anyone help me on this product synchronization issue?

Regards, Zeng