[Mono-list] problem running mono under centos 5 CLI

[iLinux85]

hello

i have vps server (virtual private server) running on linux centos 5 32 bit
, i installed vncserver x windows , gnome and kde environment and i connect
to the vnc server from vncviewer in my windows 7 desktop 

now i excute the command 

#mono Radegast.exe

in terminal and i got

 [ERROR]: - Unhandled System.TypeInitializationException: An exception was
thrown by the type initializer for System.Windows.Forms.XplatUI --->
System.ArgumentNullException: Could not open display (X-Server required.
Check y      ou DISPLAY environment variable)
Parameter name: Display
  at System.Windows.Forms.XplatUIX11.SetDisplay (IntPtr display_handle)
[0x00000]
  at System.Windows.Forms.XplatUIX11..ctor () [0x00000]
  at System.Windows.Forms.XplatUIX11.GetInstance () [0x00000]
  at System.Windows.Forms.XplatUI..cctor () [0x00000]
  --- End of inner exception stack trace ---
  at System.Windows.Forms.Application.EnableVisualStyles () [0x00000]
  at Radegast.MainProgram.RunRadegast (System.String[] args) [0x00000]
  at Radegast.MainProgram.Main (System.String[] args) [0x00000] : An
exception was thrown by the type initializer for
System.Windows.Forms.XplatUI
  at System.Windows.Forms.Application.EnableVisualStyles () [0x00000]
  at Radegast.MainProgram.RunRadegast (System.String[] args) [0x00000]
  at Radegast.MainProgram.Main (System.String[] args) [0x00000]


mono version is 

# mono -V
Mono JIT compiler version 2.4.2.3 (tarball Sat Apr 20 19:49:33 MSD 2013)
Copyright (C) 2002-2008 Novell, Inc and Contributors. www.mono-project.com
        TLS:           __thread
        GC:            Included Boehm (with typed GC)
        SIGSEGV:       altstack
        Notifications: epoll
        Architecture:  x86
        Disabled:      none




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