Hello,
I'd like to inform to you this is the Intel AppUp(SM) center support channel. I'll be more than glad to assist to you today.
The main support page for the Intel(R) Desktop Board DG31PR, you can alternatively refer to the following URL: http://www.intel.com/p/en_US/support/highlights/dsktpboards/dg31pr?wapkw=dg31pr%20support
Several could be the reasons why a driver would not install correctly. At this point, since you are using the drivers in the Intel(R) Express Installer CD, I would next recommend trying with the most current drivers, which are found here: http://tinyurl.com/npxv44
Should you need further assistance, please, refer to the following URL: http://www.intel.com/support/motherboards/desktop/sb/CS-020642.htm
Thank you for taking the time to communicate your concern to us.
Marvin O.
Intel AppUp(SM) center Support