Serial communication is not functioning correctly, how can I tell if the problem caused by the adapter or my serial software application? View Answer Older serial communication applications make use of legacy hardware addresses, often incompatible with PCI, PCIe, and USB to Serial products. Contact the software provider to troubleshoot. I am receiving an error when I try to install the drivers in Windows 8 64 bit. I have everything hooked up, but nothing is functioning correctly.