flash download verify failure?

[Altera_Forum]

dear all, 

when i download file with flash programmer in ide 5.0,but verify error ?why?thanks!  # ! /bin/sh# # This file was automatically generated by the Nios II IDE Flash Programmer.# # It will be overwritten when the flash programmer options change.#   cd E:/work/1011/hello_led_0/Debug # Creating .flash file for the FPGA configuration $SOPC_KIT_NIOS2/bin/sof2flash --flash=U14 --offset=0x00700000 --input=E:/work/10 11/sopc_jj.sof --output=sopc_jj.flash Info: ******************************************************************* Info: Running Quartus II Convert_programming_file Info: Command: quartus_cpf --no_banner --convert E:/work/1011/sopc_jj.sof sopc_j j.rbf Info: Quartus II Convert_programming_file was successful. 0 errors, 0 warnings  Info: Processing ended: Mon Oct 17 15:19:54 2005  Info: Elapsed time: 00:00:01 WARNING: Default charset GBK not supported, using ISO-8859-1 instead # Programming flash with the FPGA configuration $SOPC_KIT_NIOS2/bin/nios2-flash-programmer --input=sopc_jj.flash --sof=E:/work/1 011/FZH_KIT_BOARD/system/FZH_KIT_BOARD.sof --cable='ByteBlasterII [LPT1]' --devi ce=1 --base=0x00800000 Oct 17, 2005 3:19:55 PM - (??) nios2-flash-programmer: Launching Quartus Program mer to download:  E:/work/1011/FZH_KIT_BOARD/system/FZH_KIT_BOARD.sof Pre-Reading 142KBytes of data from U14:  |----.----+----.----|  ********************* (8.157 sec). Writing 64KBytes :  |----.----+----.----|  ********************* (6.421 sec). Verifying 64KBytes of data:  |----.----+----.----|  *********************Oct 17, 2005 3:20:21 PM - (??) nios2-flash-programmer:  Verification failure after write. WARNING: Default charset GBK not supported, using ISO-8859-1 instead # Creating .flash file for the project $SOPC_KIT_NIOS2/bin/elf2flash --flash=U14 --base=0x00000000 --end=0x7fffff --res et=0x0 --input=hello_led_0.elf --output=cfi_flash_0.flash --boot=$SOPC_KIT_NIOS2 /components/altera_nios2/boot_loader_cfi.srec WARNING: Default charset GBK not supported, using ISO-8859-1 instead # Programming flash with the project $SOPC_KIT_NIOS2/bin/nios2-flash-programmer --input=cfi_flash_0.flash --sof=__NO_ SOF_PLEASE__ --cable='ByteBlasterII [LPT1]' --device=1 --base=0x00800000 Oct 17, 2005 3:20:22 PM - (??) nios2-flash-programmer: SOF-download skipped. Pre-Reading 0KBytes of data from U14:  |----.----+----.----|  ********************* (2.859 sec). Oct 17, 2005 3:20:28 PM - (??) nios2-flash-programmer: Success. Zero bytes writ ten to U14-  (because device matched contents of cfi_flash_0.flash) Oct 17, 2005 3:20:29 PM - (??) nios2-flash-programmer: Flash programming complet e WARNING: Default charset GBK not supported, using ISO-8859-1 instead