dsPIC30F6012A, PICkit3 and Command Line Interface end with “Failed to program device” (Dan NITA)

Hello, Can someone help me please and explain this? My configuration:Windows7 Professional 64bits or Windows7 32bits IntegralProduct Version: MPLAB X IDE v2.26Java: 1.7.0_67; Java HotSpot 64-Bit Server VM 24.65-b04 Trying to program the dsPIC30F6012A ..