Reader does not have that functionality by default. You can extend your PDF on a PDF by PDF basis to turn on that functionality by Reader Extending the PDF. This is done on the server side and once done that form will always turn on the feature that you want.
Ah the code does not send a filled out pdf, only a bank one. The post above mine explained how to do it. (change the XML to PDF in the xml code, then 'enable usage rights' in acrobat. Worked like a champ.
Seems a little silly that there isn't a simple option for this in LiveCycle...
Livecycle is not liking the code--it asks me to fix it and if I don't, it deletes it. I pasted it in just as Paul listed it. Can anyone think of why it is unhappy?
Make sure the button is a regular button and not a submit button. You can only add code to a regular button. In the object palette there is a radiobutton group that allows you to choose the type of button it is.