Question : How do I add buttons on a PDF form to add/remove rows of data?

I need to create several PDF forms.  I've never created PDF forms so be easy on me.  I need the users to be able to add or remove rows of data.  Here is a link to a form that has the functionality that I am looking for:  http://www.uspto.gov/patents/process/file/efs/guidance/updated_IDS.pdf

If you enter 1234567 in the Patent Number field, you will be able to click the add button.  You can also click the remove button to remove the row you just added.  This is what I need to do on my forms.  How is this accomplished?  Is this done in Adobe Professional or LiveCycle?

Answer : How do I add buttons on a PDF form to add/remove rows of data?

It's happen to me before. Try Control Panel > System, hit Change product key, and enter your key (even if it's the same one you entered before). It should activate fine after that.