I don't use ilock, but some have claimed in the past that it didn't play nicely with LED Killer so it may be your culprit.
Another option is a freeware app made by Triangle Powers that does multiple 6800 tweaks. One of them is to stop the blinking LED. I haven't tried this so I don't know how well it works and if notifications still have the ability to blink or not.
http://www.trianglepowers.com/PPC/ViewApp.aspx?ID=54