Selendroid Inspector device Screen not appear

Question

When i connect my hybrid app using selendroid server, Inspector tool not displaying device's screen(Broken Image/Empty image appear). And also nothing is appear on Java/HTML source tabs. example Screen here

I use followings Command to Start the Selendroid Server

java -jar Jar_file -app app_file

and also i have tried

java -jar Jar_file -deviceScreenshot -app app_file

Code i used in Java eclipse

SelendroidCapabilities capa = new SelendroidCapabilities();
capa.setAut(My_application_id);
driver = new SelendroidDriver(capa);

What should i do to get a device screen in Inspector tool ?