reset sql sa password

Hi, you can try to use command prompt to reset your lost password. I have used it to reset sql sa password successfully on sql server 2000/2005.
First, open a command prompt (Start -> Run -> cmd)
Then, type the follow commands, and press Enter after each line:
Osql –S yourservername –E
1> EXEC sp_password NULL, 'yourpassword', 'sa'
2> GO
It could help you.