RenderingS​ession returns null while useing browserfield.

Question

i want to develope appli which has browserfield to browse any url.

i m using bowserfield class method from in built JDE example.

in this method i m using

_renderingSession = RenderingSession.getNewInstance();

but this line returns null while using on real device (curve 8520).

but it is working fine on simulator.

can anyone help me out? .