Root Problems installing TWRP

[Daniel rdgzAndroid]

When I put the following codes in the following error mark
adb push aboot.bin /sdcard/aboot.bin
adb push stockrecoverymod.img /sdcard/stockrecoverymod.img
adb shell
su
dd if=/dev/block/mmcblk0p6 of=/sdcard/abootorg.bin
dd if=/dev/block/mmcblk0p17 of=/sdcard/recoveryorg.img
dd if=/sdcard/aboot.bin of=/dev/block/mmcblk0p6
dd if=/sdcard/stockrecoverymod.img of=/dev/block/mmcblk0p17

In the code that gives me error is in the following, some solution, I have to move recovery.img or I have to do, Thanks

dd if=/sdcard/aboot.bin of=/dev/block/mmcblk0p6
dd if=/sdcard/stockrecoverymod.img of=/dev/block/mmcblk0p17