Ok I'm not done
Opening the box I found the following:
My DVD and DVD writer are connected with one IDE controller.
my floppy drive (3 yo computer), connected to another controller with only one connector.
There was no place for another IDE controller.
Should I replace the controller of the floppy device to another with 2 connectors to which I'll be able to connect the HDD? though I'm not sure its even an IDE thingy.
Or maybe it means its a lost cause, and my motherboard doesn't allow EIDE HDD's?
Thanks for the help.