InfoPath Dev

When trying to go to preview mode, I get the following message, INFOPATH CANNOT CREATE A NEW BLANK FORM. THE FORM TEMPLATE IS INVALID.

When I go to show details....this is what i see.

The following DataObject either cannot be created or cannot be initialized: PL Group Lookup
The query cannot be run for the following DataObject: PL Group Lookup
InfoPath cannot run the specified query.
The file is not a valid XML document.

A name was started with an invalid character.

Line 4024, Position 3
</>
--^

How do I fix this error, how can I get into the source code so I can edit line 4024.

Thank you.

PL Group Lookup must be a data connection in your form. Is it a connection to a file included with your form? Or an external file? If the file is included with your form, you can go to Tools/Resource Files and export the file that data connection is using, then open up the XML and check it out.

Just in general, if you want to see the files that make up a form template, with InfoPath 2007 you can use Save As Source Files  from the File menu -- for 2003 I think the menu command is different, but as I recall, it is still under the File menu.