Hi,
WinUAE creates blank formatted disk images, but it may be that the game requires some sort of custom save format...
In this case, a standard ADF file is not capable of storing the additional information and a custom ADF should be created instead.
For WinUAE, find the "Floppy Drives" configuration page, then click on the "Create Custom Disk" button, give it a filename, then "insert" it into the virtual Amiga's drive.
- Ali