Alright, finally have it all sorted. If I can make any recommendation to other novices like me. Follow the DashCommand Quick_Start_Guide and include a step between Step1 & Step2 where you need to go on the Bluetooth settings of your Galaxy Tab (settings-->Wireless and Networks) and first ensure "Bluetooth" is ON, second click "Bluetooth settings" and Pair with your ELM327 OBD-II device. Password should be either 0000 or 1234.
Quick Start Guide: http://www.palmerperformance.com/download/docs/DashCommand_Quick_Start_Guide.pdf