Can you tell me please what is wrong with this ERD?

[babs115]

My colleagues say it is wrong but not one of them can tell why and I don't know myself.

I attached the design and ERD for your correction ,please.

[RonB]

When I try to open your file, it fails saying that it's corrupt.

Please use mysql Workbench to create the ERD then save it as an .mwb file and attach that file.

[babs115]

I am not able to attach the mwb file.
what should I do?

[RonB]

Put into a zip file and post that.

[Siam9]

Your erd attachment is corrupted buddy.