Cisco Switch Password ---Urgent

One of client site has stacked two Cisco c3750, admin try to change password as follows;

DC-CSW#configure t
SDC-CSW#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
SDC-CSW(config)#en
SDC-CSW(config)#ena
SDC-CSW(config)#enable sec
SDC-CSW(config)#enable secret pass
SDC-CSW(config)#enable secret passw
SDC-CSW(config)#enable secret password
SDC-CSW(config)#use
SDC-CSW(config)#username cisco secr
SDC-CSW(config)#username cisco secret 7933$Yed852852
ERROR: Can not have both a user password and a user secret.
Please choose one or the other.
SDC-CSW(config)#username cisco secret pass7933$Yed852852
SDC-CSW(config)#username cisco secret pass                
SDC-CSW(config)#username cisco secret passw
SDC-CSW(config)#username cisco secret password 7933$Yed852852
ERROR: Can not have both a user password and a user secret.
Please choose one or the other.
SDC-CSW(config)#username cisco password 7933$Yed852852      
SDC-CSW(config)#exit
SDC-CSW#
SDC-CSW#
SDC-CSW#
SDC-CSW#
SDC-CSW#
SDC-CSW#wr mem

when he tried to login switch is not accepting "7933$Yed852852" infect not accepting the old password, i have told him we can reset but due to site condition its not possible.
any guess any clue, plz would be great help
Syed.