Additions in an Assembly not reflected in Parts

Hi

I am currently working on an assembly file, which i have added a series of ANSI Flanges from the deign library, but unfortunately the changes i have made are not reflected in the Part File or a drawing file.

I have made sure the 'no external references' box is un-checked, i have saved changes but still cannot work out why?

Any help would be greatly appreciated.

Thanks

SolidworksEducator Student