mac os x lion 10.7.4 problem?

[kyle]

For whatever reason, I cannot get my password to work since I've updated my mac to lion. I know the password is not incorrect, and I have not been able to reset by any using any methods I've found online. Is there any advice anyone can give me on how to reset my password?

I have attempted using the install disk, and holding down such combinations as "option", "Command+S", and "C". I have also tried doing each combination without inserting the install disk. Sometimes nothing happens when I try these, and sometimes a lock comes up with a box below for a password. Thanks!

13 hours ago
- 3 days left to answer.

Additional Details
This is a video demonstrating what happens when I try to use the Command + R or similar techniques. I just don't know what to do next!
http://www.youtube.com/watch?v=GbcPPrAB35Y