AmigaBruno, with all the problems you seem to be having, maybe you should try a different approach instead?
Here is my suggestion: Get a CF card which works with your Amiga, put it in there, and let it stay in your Amiga. Now get another CF card, but don't do anything to it, just let it stay FAT formatted. Then you can use this for transferring files from the PC (via card reader) and to your Amiga (via CF-PCMCIA adapter).