OGLES sample fails

Good mooring
I have installed powervr sdk 3.5 on my labtop with ubuntu 14.04 my GPU is nvidia GeForce 315M
driver 304.128
when i try to build sample the OGLES2 and 3 work fine but sample with OGLS fails:
PVRShell: EGL 0.0 initialized
Exit message has been set to: “PVRShell: Unable to create a context
”.
InitAPI failed!
PVRShell: Unable to create a context

Hello Fatma,

To isolate the problem:

Do the pre-built examples work?

Does 01_HelloAPI OGLES demo work?

Thanks,
Paul