Linksys PLTE200 + PLTS200 powerline net...

Day 1: setup powerline and it worked perfectly; for approx an hour we streamed a video (movie) with no interruptions whatsoever; then the network connection was lost between the pair & I couldn't get it back.
Day 2: unplugged both of the powerline pairs and connection re-established; we streamed video for about an hour and a half; then the network connection was lost and didn't come back up
Day 3: I can't get the connection to stay up for more than 30 seconds. I've tried unplugging the cable modem and the Linksys WRT54G v3 router + both powerline pairs (multiple times) but the "house" connector light will not stay on/the network will not hold connection.
Both powerline pairs are plugged directly into the wall socket. The first is plugged directly into the router & the second to a Sony Network BluRay. I've tried putting the second into multiple outlets around the house with no better results. The first's "#1 light" is blinking rapidly as is the corresponding network light on the router. All other network connections through the router are working fine.
Please advise on any troubleshooting?