VNCviewer password error

I am attending a course in which the software (cadence) is installed on the university unix server. To have access the following instruction is shared by the course team. I am using a MAC system. Steps to setup account for MAC users: 1- Open terminal: %ssh -Y @somename.universityname.edu 2- Create your session by: %vncserver -geometry 1920x1080 3- Make sure to have checked/killed all your previous sessions (keeping one) by: %vncserver -list %vncserver -kill : 100XX 4- Exit from the connection: %exit 5- Type: %ssh –L 150XX:localhost:150XX –N –f –l somename.universityname.edu and type your password 6- Go to vncviewer and type: localhost:150XX This was supposed to fire up my VNCviewer and it was working fine until I forgot the password I setup in the 5th step. I tried to remove the password by rm .vnc/passwd and later using vncpasswd. It shows the following Further (this time recording my own password) whenever I am trying to type the password (new one, and I have done it multiple times so I am sure there's no extra character) in it still says permission denied. It would be really helpful if I receive your guidance on how to correct this.