Oh. Then the PC cannot read the file format of the Amiga HD!
Have you acess to a real amiga, to plug the HD in?
Are you sure there is amiga data on the HD? (Hehe)
There is a file systm called Fat95, on aminet, that you may want to read up on...it allows the reading of PC/AMIGA data off HDs.
It sounds like you may have to port the data via floppies (and crossdos). I would also see if using another older version (8.22 revision 3)of WinUAe works.
There was a good guide to Winuae posted here.
And as a last resort check you settings on Winuae, the uaescsi.device sould be checked etc. Although it should be setup already.
I`m out of ideas...