Bootloader recovery issue

[Reza1973]

I am trying to process Bootloader recovery. After spending lots of time and installing dfu-util, Homebrew... !! finally I succeed to run this command:

sudo dfu-util -d 0483:df11 -a 0 -s 0x08000000 -D cf2loader-1.0.bin

This is the outcome:

..................................................
dfu-util 0.11

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2021 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to http://sourceforge.net/p/dfu-util/tickets/

dfu-util: Warning: Invalid DFU suffix signature
dfu-util: A valid DFU suffix will be required in a future dfu-util release
Opening DFU capable USB device...
Device ID 0483:df11
Device DFU version 011a
Claiming USB DFU Interface...
Setting Alternate Interface #0 ...
Determining device status...
DFU state(2) = dfuIDLE, status(0) = No error condition is present
DFU mode device DFU version 011a
Device returned transfer size 2048
DfuSe interface name: "Internal Flash "
Downloading element to address = 0x08000000, size = 7192
Erase [=========================] 100% 7192 bytes
Erase done.
Download [=========================] 100% 7192 bytes
Download done.
File downloaded successfully
.....................................................

But when I disconnect the USB and connect the battery, still not working !!

[Reza1973]

You can ignore my question now, I solve the problem !! Thanks Kimberly's answer to RAJAT AGRAWAL which had similar issue.