can you try to copy the content of the DVD to your hard disc and then retry the installation process? In some cases this fixxes the problem. Disabling your firewall and the antivirus-software might also affect the behaviour.
If this doesn't work I would kindly ask you to create a Log-File for your installation process (see links below for the exact procedure) and directly contact your local NI support.
Creating an Error Log File for a Software Installation: