It's probably a setting in MPC, you can try disabling some options but I'm not familiar with MPC.
Also the Apollo's can be funny cards with some software/apps, I'm thinking there may be more to setting up the Apollo 1260 then just adding the 060 libs, some kind of CPU command needed in the SS IIRC.
I don't have an Apollo 1260 yet though, I have these fun & games to look forward to!
Hope you figure it out.
Steve.