X-10 appliance module

Hello;

I'm using the aqua controller jr. with an x-10 appliance module. I had it
hooked up to a magnetek ballast for two 160-watt VHO flourescent bulbs. After a
few minutes it blew out. I know the ballast pulls more power then the 320 watt
bulb load but it seems like the module should be able to handle that load. I'm
wondering whether it was defective or overloaded? Not too thrilled about trying
another one before I have a better idea about that. Anyone have experience
loading them down with VHO type ballasts?

thanks;

Bob