What would be killing a dwarf lilac bush that has a dying branch each week and has been treated for borers?

I have the same problem. I have lost one dwarf lilac bush all ready and now it looks like the one next to it is starting to die. I was told the first one that died had Gurgling (sp) root disease. The root starts to wrap around itself and chokes off the other roots. Has anyone heard of this? Also is there any cure?

See the web link to the left for some general information on lilac problems.