Disable the floppy both in Boot order and wherever else it appears in BIOS.
How about trying another DVD drive?
Normally the error message means HD is disabled or disconnected so reinstall it and check its connections carefully so that it gets correctly initialized. If you just bought it new, then use included Tech Support to walk you through correct install.
I realize you tried another IDE HD and got the same error so that seems to narrow it to controller, since these have different cabling.
Can you try installing from USB flash stick? USB Windows 7 Installation Key Drive - Create
Hopefully others will pitch in.