Yes! I appreciate your help Harry, your comment about antennas helped me to trace back and find the solution...
My reply to the H/W type was SmartRF05, Rev 1.8.1.
CC2530EM is what I copied from "Z-Stack User's Guide - CC2530DB.pdf", and I guessed any CC2530 evaluation module is coming with some sort of PA, however none of the PAs are enabled in hal_board_cfg.h . It would help newbies like me if the document mentions that.
Anyways, this was a very good startup training for me,
Cheers,
Sina