System error with advises

I have a .dll that has been working just fine, but all of a sudden,with no changes, it is giving me this error - "Implementation doesn't take advises" ????? I have no idea what this is. I have unregistered it, recompiled it, cleared out all old data files, still no go. I am going blind with this, please help???? :eek2:

That's not a normal error... I would imagine the DLL itself is throwing it. Do you have access to the source code of the DLL?