@Carl  Well this is the most confusing thing ever.

On that particular breaker there are 7 outlets. on 4 of the seven the unit works fine. The other 3 it won't work. Those 3 are on both sides of the same wall. 

They all have power and according to my tester they are wired correctly. There is nothing special plugged into any of them except a couple of usb chargers. Unplugging the chargers didn't make any difference.

Any ideas as to what could cause that sort of problem?

I always get a power light. I get the ethernet light when the ethernet is hooked up. I get the powerline light when it connects. On the ones it won't connect I don't get the powerline light but get the other 2 lights.

Thanks for any help,

Jim

@Carl 

Found the culprit.  The device I wanted to use this with is a Tablo OTA device. Apparently if it is within a foot or so of the Link adapter it causes some sort of interference. If I get it further away then it is ok. I haven't hooked up the ethernet cable yet to see if that will kill it again. But will do so soon.

Thanks again,