I followed the step by step tutorial given in the help
i got this :
Trouble Writing Memory Block at 0x2c00 on Page 0 of Length 0x200: Error 0x00000002/-1190 Error during: Memory, The DTDMA memory request is not serviced by the HW memory system. This could be caused by the memory address specified does not exist in the specified memory/cache level. Sequence ID: 70 Error Code: -1190 Error Class: 0x00000002