The Topaz Signature Capture Pad is connected but I can't sign the NDA agreement.

Make sure you have the Topaz installed.  You can go to the Topaz website and download the sigplus software.  Make sure you install the demo to your desktop (option in installer) and run the demo.  This will allow you to see if the Topaz is working.  If it works on their software 100% of the time, it will work in PassagePoint.  If not, your Topaz unit may be defective or you may have to call Topaz technical support.