polygon symbol not working on result

[ADITYAKUMAR1]

Hi,

 I am working on the Basic area example. https://developers.arcgis.com/javascript/3/sandbox/sandbox.html?sample=routetask_basic_servicearea. When I use the service area everything works fine, but when I use my custom service area task the polygon result does not get plotted. However, it does not result any error to me. But if I store this polygon and try to intersect, the intersect does work. 

Below is the output from Custom Service task.

How to bring the polygon with  polygon symbol on map?