Won't attack certain targets?

[endersblade 0]

I fired this bot up after an extremely long hiatus.  Decided to test it out while farming old Cata instances.  I managed to get through the entirety of Blackwing Decent, but once I got to the final fight with Onyxia and Nefarion, the rotation stopped doing anything.  It didn't matter if I was targeting Ony, Nef, or one of the adds, the rotation flat out wouldn't do anything.  Just stood there.  This was on a frost mage at first.  I tried three different class profiles, nothing worked.  I switched to arcane, same thing.  Just won't work.

It's ONLY this fight (so far) that is doing this.  It worked just fine for the rest of the instance.  I haven't tested other instances or other classes yet.

[Droidz 2738]

Hello, can you share your log file (after get this problem). Do you have activate option "start fighting with elite" and increment "max unit near" (in advanced general settings)?