Blitz collisions do not work on animated objects. The collision will still be calculated against the 'base' frame (the one you created before adding animation).
And for the record, you'll get the same problem when using LinePick etc against animated entities.
And for the record, you'll get the same problem when using LinePick etc against animated entities.
This is not true for .3ds and .x animations. In that case you only need to collision-handle (or linepick) the animated meshes children, they are individual meshes and need individual collision setup.