Hello. Please help with debricking my tp-link TL-MR3220 v.1.2 (not tl-mr 3420)

I tried to flash it into dd-wrt. Flashing process went well, nut router started cyclically rebooting. (cannot boot)

I think it happened because I forgot to turn off the firewall on the computer:

Here is what I did in the process.

1) connected router to PC via cable

2) from web panel switched the wifi of the router off and then rebooted

3) from cmd did ipconfig /release then ipconfig /renew

4) from webpanel chose factory-to-dd-wrt.bin file and pressed to upgrade

   the process went well, but the router went into cyclical reboot mode (cannot boot)

As i said, may be it happened because i had forgotten to disable firewall on the computer.

Please help to recover my router!!