Saving infoPath form to be open on another machine

[Shawn]

I am able to set security permissions to Full trust and add certificate and
then email to another person the form and will open. If I add a dropdown box
with a datasource connected to a sharepoint list and follow the same
instructions then on the other machine I get "the xml schema file spefified
in the form defintion(.xsf) file for dataobject xxx cannot be used. This is
if I open in design mode. So if I am a developer and I save an infoPath form
with a dataconnection for a dropdown and later need to give that to another
person, how do I do that without removing the connection?