Hello there,
I am having almost the same issue, however I am having trouble following your suggestion.
I need to publish my exiting InfoPath form in another site via the InfoPath form webpart, so that a new list item can be submitted from another site in the same site collection.
I have created the data connection in the form as you suggested. How do I publish the form to another form library in the site where I need it? The only way I can think of to do this is to create a template of the list and create a new empty list - that gives me the form but it is connected to the empty list not the one in the other site.
Or are you suggesting that I have to recreate the form, changing the binding of all the fields to the 'new data connection' rather than the 'Main Data Connection'?
I know this original post was a while ago but if anyone has any suggestions, your help would really be appreciated.
Many thanks!