5a693e87_Plus__known_issues____RealVNC___Workaround
[ID] 206 [Description] VNC Viewer Plus displays error 12009 if you attempt to establish a connection under Windows XP SP2. [Status] Won't fix. [Workaround] 
SP2 is not supported. Please install SP3.
VNC® Viewer Plus (known issues) - RealVNC®
Workaround