Issues in Posting Data

Hi all,

  I tried this code for  posting data but its not working i'm getting error like Method 'POSTADVERTSET_CREATE_ENTITY' not implemented in data provider class. Any other code i missed here. please correct it.. Thanks in advance.

CODE:

Posdata: function(evt){

          var oModel = this.getView().getModel();         

          var vProperties = {};         

           vProperties.Offid="0000366";

          vProperties.Rcins="00000043";

          vProperties.Pbdat="2015-07-30T00:00:00";

          vProperties.Vldat="2015-07-30T00:00:00";

          vProperties.Pcost="300";

          vProperties.Idtxt="ODATA TEST";

          vProperties.Curry="USD";

               //vProperties.Id = 0;

               oModel.createEntry("PostAdvertSet", vProperties);

          oModel.submitChanges(this._fnSuccess, this._fnError);        

          oModel.refresh();

},