Strange new problem -A1 on - A1 off 60 times a minute

[EL34]

I have several of the big 20 amp filters on all the UPS's ( I have a network of 5 PC's here)
I have several 10amp and 5 amp filters on all offending electronic devices like battery chargers, TV's, etc

The whole X10 sytem has run very well since I added the filters and couplers about a year ago.
Before that, I had all sorts of problems.
The X10 net work used to be very unreliable.

Thanks for the help Jeff