tp link mr3220 reset button???

[bbsux]

I'm trying to update my mr3220 from 1.57 to 1.58. But for some reason I can't logon. I know what the password is and I have logged on before. So anyways I tried to just reset it to defaults using the button. But I can't seem to get it to work. Is it enabled? I've tried keeping it held down after power up for 30 seconds and while powered up as well, but none of it works.

Can I program it via tftp via serial?

[bbsux]

well I have serial access and a shell prompt. can I reset the password from the shell?

[bbsux]

I used instructions from

http://wiki.openwrt.org/doc/howto/generic.failsafe

mount_root

then to reset password type

passwd

or to just make it reset to defaults type

firstboot