this works on a 2900 switch so don't know if it works on this one.
make sure you are on console port
hold the "mode" button on the front of the switch at the same time you turn it on, let go of the mode buton a sec or 2 after the led light above prt one is no longer lit.
when "switch:" shows up type
flash_init
then
load_helper
then show dir "dir flash:"
rename the config.text file to another name so youu can reboot type boot then you are into a switch with no config file and no passwords, change the config.text file back and copy from flash to sys:run-con and then you can change the password to what you want.
hope this helps