[CentOS] kernel-2.6.9-55.0.12.EL not booting (lvm? 3ware?)

Hi,

	Here's he setup.

Original Kernel:

kernel-smp-2.6.9-42.EL, booting fine.

Error with kernel-2.6.9-55.0.12.EL (and kernel-2.6.9-55.0.12.ELsmp)

No volume groups found

Volume group "VolGroup00" not found.

ERROR: /bin/lvm exited abnormally!

The system has a

3ware 9000 Storage Controller
Model: 9500S-4LP
Firmware FE9X 2.08.00.006, BIOS BE9X 2.03.01.052, Ports: 4.

Anyone seen this?

I've googled but can't find anything, except that:

[184523] -add support for 3ware 9650SE SATA-RAID (Chip Coldwell) ... in 
2.6.9-44

Regards,

Ugo