Configure 1 sql server instance for external access(repost)

This project is not a complicated one. We have two SQL 2008 instances on a Windows 2003 server. We are using a basic router/firewall. However, we can't seem to figure out how to make the two instances visible externally, but also even locally one instance is not resolving as expected. See below: MSSQLSERVER (PRODUCTION) / 98.144.***.18 / [login to view URL] => is working SQL2008DEV (DEVELOPMENT) / 98.144.***.19 / [login to view URL] => is not working We want you to make the DEV instance work and that is it. Please have good exeperience and be ready to fix immediately, we are late with some projects due to this issue.