Sitemap published on Google, they said it was not right?

I am using the Fluid store and the Fluid WP themes. When I finished my store and sent it to Google, I sent the url to the site's map (which was generated automatically in the fluid topic) without putting xml or php at the end.

I tried to resend, but Google would not allow it. strange. I'm hitting the end of my knowledge rope here.

Does anyone know how to fix this?

Thanks, -FN