Now i am reading the nand with JtagTool.Have you opened the nand bin in JTAG Tool? If so, check your task manager, one day I checked mine and I had 47 JTAGTool.exe running! If JTAG Took is still using the bin file then no other program can access it.
You can also test to see if this is the problem by simply copy/paste your nand and open the copy in 360 Flash Tool.
and thill now he has 9 bad blocks.