Ok, For what it's worth. 1 is all these boxes plugged into a switch? Have you tried setting up the card, then unplugging the switch and turning it back on? 2, have you a firewall or anything and maybe you need to re-run the script? Have you tried a different cable? You maybe have tried all these, but I only mention it because ay its the weird stuff that bites you best. Have you gone through the bios to be sure there's no weird stuff about nics or some really off the wall irq issue? Don't know grasping at straws, but I tend to do that and have found answers this way. Good luck