Hello there! Please follow the steps below
Turn off your Mac.
• Turn it back on and immediately hold down the Command(Apple) and S keys together for 10 seconds to boot into Single User Mode
• When you see the text prompt, type in the following terminal commands to create a brand new Admininstrator account (hitting return after each line). Also, note down the spaces between the commands, like a space between mount and -, space between -uw and / etc
mount -uw /
shutdown -h now
After rebooting, you should be able to create a brand new Administrator account. Then in new account, goto System Preferences > Accounts, select your old account and change/reset the password. Then logout from Apple menu and login to the old account with the new password.
Hello again. I am posting back because i have not heard from you hopefully this a good thing as your problem is possibly fixed. Please either post back if your still having problems or just rate this reply ( 3 stars or better).