HP RX2620 don't boot wheezy

[Newton <newton.junior@ibge.gov.br>]

I'm trying install Debian Wheezy in a RX2620 Integrity but I end with a
unbootable machine, it stay rebooting in loop.

I try install by netinst CD and via a upgrade from squeeze, in both I have
problems in the initrd step, the initrd.img-3.2.0-4-mckinley from wheezy
don't work, but old initrd.img-2.6.32-5-mckinley from squeeze works fine.

Any ideas?