Firmware password ignored

Hello
I set a firmware password but it is ignored at boot time and I can no longer boot from the DVD.
I booted from the original Apple DVD (by holding the c key) and chose the firmware password from the utilities. After setting the password, I rebooted and boot succeeded without a password prompt. I have shutdown/restarted many times and not seen the prompt.
I also can no longer boot from DVD. Booting while holding the c key no longer works.
Note, if it means anything, that the 'nvram -p' command gives 'security-mode command'
Can anyone help/advise.
Thanks.

I have a MBP and just set a firmware password a few hours ago. To make sure it took, I held down option key and also did the keys for open firmware (O + F), C for startup from CD/DVD and T for Firewire target disk mode and nothing worked as it should.
Here's one option for you. Open Terminal. on the command line type: nvram -p
This is the unix command for working with open firmware. The '-p' prints the values of the public variables to the terminal window. Amongst all the gibberish, look for the following line:
security-mode [value here]
If the [value here] on your system says 'none' then, for some reason open firmware didn't take.
If the value is 'command' then it should be working correctly
Also, if you have replaced your internal optical drive with an extra hard disk, make sure you have the volume you want to boot from set correctly in Startup Disk. Amongst the variables that Open Firmware stores is the startup disk. So if you have two internal drives and you set the firmware password on one and you normally boot your computer with the other drive, that could be why its not working for you.
At the very least, I would take the time to try it one more time via the DVD utility. Startup off the DVD, turn off firmware password, restart the machine, startup off the DVD again and set a firmware password and then restart again. I would think it would be fine at that point.
Two cautions:
1) Be careful where and with whom around you use this command as the open firmware password you chose is not encrypted, it is only obfuscated. Unix is actually showing you your firmware password in hexadecimal notation so it could be deciphered by someone who knows how.
2) While you can use sudo with nvram to change open firmware variables, I do not recommend it as I have not tried it and I don't know how your system would behave. So if you choose to do this you do so at your own risk.
Let us know what happens.

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