InfoPath Dev

I'm completely new to infopath so please be gentle. heres my scenario:
Upgraded server from SBS 2000 to SBS 2003
Name of server has been changed
Now when I open the infopath form, the "Data Source" is incorrect

How do I fix that?

Also how can I make it so users can automatically log in once they open the form? right now when it opens, in the username field is ADMIN and nothing for password gets you in (mode -DB readwrite).

Thanks in advanced

The Microsoft InfoPath SDK has a tool called PIFix that will do it. Or you can just edit the XML file and update the PI information to have the correct data.