Router not forwarding VNC

[Adam Bowers]

I know this subject has been beaten to death, but I cannot VNC from outside my
Belkin wireless Cable/DSL gateway router.  I have poured over many of the
postings already without avail.  Here is where I stand so far:

1.) I use IE to access my router's IP (192.168.2.1), and it brings up a nifty
interface.
2.) I access the Virtual Servers section, and for inbound port I put 5900-5900
as well as 5800-5800.
3.) For private port I enter the same information.
4.) I point the ports my private IP address (192.168.2.15).
5.) After applying, I fire up the RealVNC Viewer and enter my WAN IP
(65.40.x.x, which I found using ShieldsUp).  Fails to connect to server.

ShieldsUP reports that port 5900 is closed.  I have tried changing the private
port to 5901, but the router will not accept the two port types to be
different numbers (the screen shots will clarify).  Also, if I just type in my
WAN IP address into IE, a dialog box asking for my username and password pops
up.  My router is password protected, but it does not have a user name.  Any
ideas as to what this is?  I posted some screen shots and some output files at
http://www.angelfire.com/fl4/fsuguy/router.htm I am using Sprint DSL.  I also
have ZoneAlarm Pro installed, but it has not been running.