"No drive found, to create filesystem"...problem with fedora 6 paravirtualization

[Vania Martino Toma]

Hi,
i've installed fc6xen, the service of XEN and the Domain0 starts correctly.
I've tried to install another fedora6 paravirtualized and i've selected
installation in 1 large file (xen1) with 5 GB of space limit in
/home/b4y path. The installation in VNC starts correctly, but in the
window to create the partition structure, not appears the virtual hard
drive. The installation stops with the message " no drive found, to
create filesystem...".
Help me, please!!!
Best regards

Vania Toma