error run on vncserver :1 -geometry 1680x1050 -depth 32, why?

gistfile1.txt

vncserver :1 -geometry 1680x1050 -depth 32 
Couldn't start Xtightvnc; trying default font path.
Please set correct fontPath in the vncserver script.
Couldn't start Xtightvnc process.

25/06/16 16:58:29 Xvnc version TightVNC-1.3.9
25/06/16 16:58:29 Copyright (C) 2000-2007 TightVNC Group
25/06/16 16:58:29 Copyright (C) 1999 AT&T Laboratories Cambridge
25/06/16 16:58:29 All Rights Reserved.
25/06/16 16:58:29 See http://www.tightvnc.com/ for information on TightVNC
25/06/16 16:58:29 Desktop name 'X' (debian:1)
25/06/16 16:58:29 Protocol versions supported: 3.3, 3.7, 3.8, 3.7t, 3.8t
25/06/16 16:58:29 Listening for VNC connections on TCP port 5901

Fatal server error:
Couldn't add screen
25/06/16 16:58:30 Xvnc version TightVNC-1.3.9
25/06/16 16:58:30 Copyright (C) 2000-2007 TightVNC Group
25/06/16 16:58:30 Copyright (C) 1999 AT&T Laboratories Cambridge
25/06/16 16:58:30 All Rights Reserved.
25/06/16 16:58:30 See http://www.tightvnc.com/ for information on TightVNC
25/06/16 16:58:30 Desktop name 'X' (debian:1)
25/06/16 16:58:30 Protocol versions supported: 3.3, 3.7, 3.8, 3.7t, 3.8t
25/06/16 16:58:30 Listening for VNC connections on TCP port 5901

Fatal server error:
Couldn't add screen