Thank you for the post.
To use Instant Web Publishing the database file must have all layouts in the classic theme. A theme is applied by default to a newly created database and any layouts added, so if even a single layout contains a theme, then an error message will be recieved when trying access through the browser. Switching all layouts into the classic theme will allow for the database to Instant Web Publish.
FileMaker Go on the iPad connects over FileMaker's registered default network sharing port, 5003. To setup FileMaker's Network Sharing follow the steps outlined here:
If you have any additional questions, please let me know.TSFalconFileMaker, Inc.