Downloaded game through steam and all seems great but when wanting to save the game It says "cant find disc - please insert"? I thought the whole point of playing through STEAM is that you dont need disc?
Indeed if you have downloaded the patch from the website and installed it is likely this is the cause of your problem. Steam automatically patches games so you will never need to download the patch manually. If you have downloaded the patch and installed you will need to uninstall FM11 (right click > delete local content) and re-install.