TightVNC keeps asking for valid password

Posted on 2007-10-10
Last Modified: 2011-03-11
Hi All
I have installed tightVNC and started it as a service..I have also set and reset the password a couple of times. I have installed tightVNC on a Windows2003 server using the Admin account.
However when I try to logon to the server from my PC using tightvnc viewer I keep getting the following error :

"This server does not have a valid password enabled. Until a password is set, incoming connections cannot be accepted"
Question by:http://
    LVL 12

    Expert Comment

    under vnc service server property mode check that vnc password authentication is enable.Otherwise, try to uninstall and reinstall the software...
    LVL 19

    Author Comment

    If you mean the primary password and the viewonly password I have set those..and I have tried to reinstall the software
    LVL 17

    Accepted Solution

    I wonder.... is the server logged into at the times you made an attempt? If so, try logging out and leaving it at the login screen, THEN try to VNC into it. If not, try logging into the machine, then try to VNC into it from your PC.

    Possible that there's a mixup between the default system password and the password when a certain user is logged into the server.
    LVL 19

    Author Comment

    I just uninstalled TightVNC and purchased RealVNC and installed it, RealVNC is working fine under the same conditions. It is a shame TightVNC used to work always. This was critical since we were having probs with terminal services on a remote server and there was a chance that we could get locked out.
    LVL 17

    Expert Comment

    That's odd... and you're using the newest version? Haven't had any problems with it (so far)
    LVL 19

    Author Comment

    Yep downloaded it right from sourceforge

    Expert Comment

    Windows Registry Editor Version 5.00
    Copied the HKEY_Current_User to the following location. I have blanked out my passwords but under password and passwordviewonly is were the Binary settings are. After you have set your VNC password then copy the Hex key and past it under the password and passwordviewonly keys


    Expert Comment

    use the new version of TightVNC if you are using Windows7 64-bit.  The version that worked for us was 2.0.2.

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