I've two identical PCI AT-2701fx/mt cards and two identical PCI-E AT-2711fx/mt cards...all fiber optic. The two 2701 cards see each other and link. Both PCIe 2711s connected to either PCI 2701 see each other and link. The two PCIe 2711's will not direct link. Do not even see each other. I've tried different drivers with no luck.OS is Windows 10 home on both machines. Assigned static IP addresses to both machines...direct transferred files back and forth. But the two PCIe 2711s will not negotiate at all. Dark LEDs...I am not a technician just someone messing around with this. Thanks for any suggestions!