Please help me.
Yes, there seems to be a problem with that PDF - I cannot open it with the Adobe Reader plugin 11.0.07 on Firefox 29.0.1.
Right-click on the link to the PDF, then select Save Link as / Save Target as, then save it to your local disk and open it from there.
Actually I'm trying to open it from my mobile (Android) and the Adobe reader that use is 11.4
Adobe Reader for mobile devices can't open this document.
Use a Mac or Windows system.
This is an XFA form from Adobe LiveCycle Designer.
[topic moved to Android subforum]
Actually I was just able to open the form in Firefox after reconfiguring it correctly: http://helpx.adobe.com/acrobat/kb/pdf-browser-plugin-configuration.html
What is your operating system? Browser? Reader version?