InfoPath Dev

I am developing a relatively simple Infopath form on my local machine.  I have an XML file on my local machine that I am using as a secondary data connection to populate selection lists.  When adding the secondary connection, I am not given the choice as to whether I want to use this secondary connection as a resource file or not, it just creates the resource file.  I select refresh on open. But when I modify the XML file (using another form) and add items, I can't seem to refresh the XML into my main form.  Recreating the resource file doesn't help. 

 I made my main form into a fully-trusted form just in case. No difference. 

 Thanks for your help.

 Hi, Susie - is your form browser compatible or filler (form options > compatibility)? If you create a new data connection (now that your form is full trust) to the same XML file, will the new data connection allow you to select "Access the data from the specific location"?

Thanks, Hilary.  I had selected a blank form and it was a browser form.  I changed it to a filler form, and now I can select "Access the data from the specific form".