Update, I found the actual recordings are on the microSD cards but not showing up in playback calendar. I removed the SD cards and put into another computer and viewed with Dlink HDD viewer, all recordings are there, so must be some sort of software problem!
So far very disappointed with Dlink it is more of a toy than a proper reliable security system. I committed too much money and time already to the system. I will not recommend to any body who is seriously looking for a reliable security system.
Has anybody got a suggestion on how to fix this.
Bob