Here is the procedure to recover an enable password.   Password Recovery Procedure   Use option 12 when a password is lost. This allows the switch to boot one time without prompting for a console password. Note that the enable password is not prompted for in this mode.  To recover a lost password for the local terminal only:   1. From the Boot menu, select 12 and press .  The password is deleted. 2. The boot process resumes. 3. To ensure switch security, reconfigure passwords for applicable management methods.    Then once you are in you will want to either change the password or set for no password with this command.   enable password  Use the enable password command in Global Configuration mode to set a local password to control access to the privileged EXEC mode. To remove the password requirement, use the no form of this command.   Syntax  enable password password [encrypted] no enable password   • password — Password for this level (Range: 8- 64 characters). • encrypted — Encrypted password entered, copied from another switch configuration.  Default Configuration  This command has no default configuration.  Command Mode  Global Configuration mode User Guidelines  This command has no user guidelines.  Example   The following example defines password "xxxyyyzzz" to control access to user and privilege levels.  console(config)# enable password xxxyyyzzz  Hope this helps, Keep us updated if you can.
I'm trying to collect tech-support, spanning-tree, running-config and arp. But I can only manage to get the arp log,when i want to use the privileged EXEC user"   It showed : User:adminPassword:********console>enableAuthentication failed.console> Anybody can help me.. please... 
POWER CONNECT 6220 : cannot use the "enable" command to acces the privilege 
EXEC user