Unable to open Adobe Reader XI form with Infix 5.28 WIN

I am unable to open an Adobe Reader XI form with Infix 5.28 WIN

The form contains confidential information, so I am reluctant to post it.

Suggestions?

Infix 5.28 did not have the ability to fill-in interactive forms. This was introduced in Infix 6 back in December 2012.
Please download the latest demo to see if it performs better with your document.