Failed to load Autodesk Inventor 2012 Installation

I am getting errors on initializing Autodesk Inventor 2012 Education Student version.
I already tried to modify the dll and also,
I deleted the .pit file from my computer but it doesn’t work on my Windows 7 64-bit PC.
I am running the installation locally and even tried to run from the disc but both processes are not working.
I posted the errors below.

Error
Failed to load
\windploy.ce.gatech.eduprograms$autodesk2012inventor_64setupadlmpit.dll (126)!
OK

Error
aslmPITValidateKey was not found in \windploy.ce.gatech.eduprograms$autodesk2012inventor_64setupadlmpit.dll
OK
