There is a bug in the 615 C3, at least, and I never quite tracked it down. You can prove this to yourself by resetting the 615 to factory defaults, then see if it works. Selectively configure each configuration change one at a time, like adding wireless security, etc. I suspected it might be remote administration that messed mine up; but had to reconfigure remotely and just didn't have time to mess with it after I got it working. I used remote desktop to reconfigure it, not remote administration.