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Welcome to the boards daveva.
Dan I think what daveva is referring to is the PA011 module. This is the pro version of the SR227 receptacle module.
Since your setup use to work and now it doesn't it may be that something has been added to the house that's acting as a signal sucker rather then noise on the line. Your on the right track by getting the ELK-EMS1 to check your setup. Let us know how it goes once the meter arrives.
Happy Holidays
(http://www.bdshost.com/X10/lpup.gif)---(http://www.bdshost.com/X10/lpup.gif)---(http://www.bdshost.com/X10/lpup.gif)---(http://www.bdshost.com/X10/lpup.gif)---(http://www.bdshost.com/X10/lpup.gif)----KDR
(http://www.bdshost.com/X10/xmasl.gif)
Could you slow down the blinking light a bit. I think I'm going to have a seizure. ;)
No really it's a very cool image! Thanks for the touch of holiday spirit.