There are several reasons why this issue might happen. Mainly this is related to the MXI connection and your PC's characteristics. Follow the instructions below to solve the issue.
1. Restore the default settings of your chassis:
- Run Command Prompt as administrator
- Type command bcdedit /set pciexpress default
- Reboot computer
2. If the above method does not work, your mainboard bios are incompatible with the PXI-4065.
If none of the above methods work, please contact NI support.