ImportError: No module named usarros.msg

[AarifKhan]

while using your package usarros-master i am getting this error:
"ImportError: No module named usarros.msg"
go to the following link to view the full description:

https://www.dropbox.com/s/mvhzfkp6h4c8fjz/usarros-master%20issue.doc?dl=0

I am trying to navigate a P3AT robot spawned in USARSim environment using your package(usarros-master), i have downloaded your package from github and compiled it successfully using rosmake command of ros.

Thank you