CID Name Prefix is not working in Ring Group Module

I have installed elastix 2.0.3 and has forworded my DID number at my cell phone through Ring Group. I get the calls but the CID Name Prefix is not working in through this Ring Group. It works fine through inbound route but does not work through Ring Group. The CID Name Prefix does not work at all and does not show anything on the cell phone. It only shows the caller number and no CID Name Prefix on the cell phone. Can anyone help me here how to fix this problem? Even I have tried and installed the new stable version of elastix 2.2.0 but could not get any luck. I will appreciate if anyone can give me any idea how to fix this problem so that Ring Group (CID Name Prefix) start working and start showing on the cell phone?