I successfully injected my form with Qrules (appears to be version 5.2). I can open the form successfully but cannot preview it. The error message I get:
We can't connect to 'http://serverurl/QdabraRules.xml'. Please make sure you're using the correct web address.
And then:
The query cannot be run for the following DataObject: QdabraRules
InfoPath cannot run the specified query.
The file is not a valid XML file.
The file cannot be accessed