Using NFS to read image file

[Marcela Castro León <mcastrol@xxxxxxxxx>]

Hello:
When I start the guest with an image on NFS file system, the ubuntu doesn't boot, It's remain on inittrams.
I've tried to redefine the guest without 
<apic>
<pae>
configuration as I see on a blog, and I've increased the parameters of the mount to rsize=32768 and wsize=32768, but it still doesn't work.
Can anyone give any advice to get it?
Thank you very much.

Marcela