Unable to Flatten Forms

Adobe Acrobat 9.1, forms created using LiveCycle Designer. I've designed multiple forms where a supervisor can enter instructions on how to perform certain job tasks. I'd like to flatten the filled out forms so that I can merge completed forms into a single .pdf rather than a portfolio of forms.

I've downloaded and inserted into my Javascript folder, the app PDFScript_FlattenPages. In Acrobat, with a filled out form, I click on the Flatten Pages button and nothing happens. When I go to the Javascript console I get the following error message:

Notallowederror: Security settings prevent access to this property or method
Doc.FlattenPages:266:app
FlattenPages:exec

I made no security provisions in Livecycle. In Acrobat, when I check the document restrictions, I see the following:
Changing Document: Not Allowed
Document Assembly: Not Allowed

No security provisions are chosen in Acrobat either. I'm not sure where I go about allowing document changes.

I read of another method of flattening by going through PDF Optimizer, however I can't choose that because I get the message "Adobe XML form can not be optimized".

I'm fairly new to Acrobat, and stumped. I appreciate any suggestions.