Hi, ACC1023650 and hawaiicop
I understand that you are having some issues trying to set up your Slingbox for Internet Viewing with the Belkin F9K1103VA router.
Even though we do not have a tutorial for this specific router model, I recommend you to check the following third-party links in order to adjust the router settings.
Port Forwarding SlingBox on the Belkin F9K1003v1
Just make sure to use the Manual Configuration option when setting the Slingbox for Internet Viewing. This way, you should have no issues if you use the SlingPlayer for iPhone and iPad.