IWP is used to share your database for access with a web browser.
Who is hosting the databases?
The recommended port for hosting is 591. This port and port 5003 would need to be forwarded to the machine hosting the database.
These port will also have to be open in your firewall.
Start with this:
- in File -> Sharing -> Instant Web Publishing -> Advanced set the IWP port to be 591
- on the machine that is hosting the file, launch your web browser.
- in the address bar, type localhost:591
- do you see the default IWP home page, and your file listed as available?