How to reset cisco 2960 password
That method is from my point of view wrong. Cisco switch would not reset the password during boot up and holding mode button. That is only the first step in the procedure. Rely on official cisco step-by-step documentation:
http://www.cisco.com/c/en/us/support/docs/switches/catalyst-2950-series-switches/12040-pswdrec-2900xl.html