HexSys Google Map Module - MARKER NOT SHOWING

I need help urgently please... I am using your HexSys Google Map Module and put in my lat/long coordinates. but the markers won't show up, what am I doing wrong! I have put in all the values as your example page, but still can't get it to work.
Here's my address : X-4126 A, Ground Floor, Gali No. 13, Shanti Mohalla, Ghandhi Nagar, New Delhi. 11003
and my lat/long coordinates : 28.659571/77.266377

PLEASE HELP!