You don't need the internet toolkit, this is for something entirely different.
If it works in the local network, it will work from everywhere. However, you might have one of the following problems:
-- Check your browser access options in LabVIEW. Do you only allow access from the local subnet?
-- Do you have a public IP or is your intranet behind NAT? If it is behind M-1 NAT (One public IP shared by several private IPs) you need to forward the correct port to the private LAN IP of your PC. This is done in the router configuration. From the outside, you later need to access the public IP of your router to get to your PC.
-- Is there a coporate firewall that prevents incoming connections?
-- Do you run personal firewall software (Zonealarm, Sygate persona
l firewall, Kerio, etc.). These need to be configured with policies to allow access.