Error when submitting InfoPath form SharePoint Services form library (InfoPath cannot connect to the data source)

Using the RegForm Tool to Create a Fully Trusted Form

Use the Below Syntax to Register form in the Server as Fully Trusted

RegForm /U urn:MyForm:MyCompany /T Yes C:MyFormsMyTrustedForm.xsn

If the Form is Fully Trusted then it will have the access to connect to other data sources such as SQL.