If you want to reset the password from console you have two ways:
first you can establish the connection with DSS using PuTTY,
second accessing the console directly.
Here you can find How To article: kb.open-e.com/How-do-I-connect-to-the-console-remotely_97.html .
When you are connected press CTRL + ALT + P.
After that you should see this window:
If you are sure that you want to apply those changes press Enter.
IMPORTANT: Using CTRL + ALT +P will restore all administrator settings to the factory default.