also it is stating the input radiation values are all zero
This is an issue with gencumulativesky component. Check this discussion and make sure the sky gets generated correctly: http://www.grasshopper3d.com/group/ladybug/forum/topics/weird-radia…
Thank You Moustafa for all your support ,
the issue was the defualt directory of LB and the working directory for GenCumSky were not the same, also to upgrade the components . and now it worked 
Appreciate your help!