Hi all
IIRC from the other thread, the problem was the HD that's different.
In some (very rare) situations, a CDROM could be totally not compatible with a HD and often the problem is the HD itself and not the CDROM.
It happened to me too, years ago.
BTW- probably you have already done it but . . have you tryed the working AK4T HD-CDROM companion, in the A4000D?