You HDD driver obviously does not support disk-change interrupts. So you have to tell the file system to use polling instead of interrupts. Depending on the file system used, this can either be done by editing the DosDriver (usually an argument of the Startup or Control keyword) or in a prefs program. For CacheCDFS this is either CDFSPrefs (when using IDEfix) or CacheCDFS (when using OS3.5+). CDFSPrefs usually complains about non-matching settings when you run it and you only have to save the new settings without changing anything.
Bye,
Thomas