CentOS - Sep 2006 - mount problem on LVM2 w/ kernel-2.6.9-42.0.2

Recently I update a server running CentOS 4.3 to kernel 
2.6.9-42.0.2. After the update it had a problem to mount
LVM partitions, showing the follow error during boot:

  No volume groups found
  Activating logical volumes
  Unable to find volume group "lvm1" 
  ERROR: /bin/lvm exited abnormally! (pid 199)
  Creating root device
  Mounting root filesystem
  mount: error 6 mounting ext3
  mount: error 2 mounting none
  Switching to new root
  switchroot: mount failed: 22
  umount /initrd/dev failed: 2
  Kernel panic - not syncing: Attempted to kill init!

Root partition is a LVM2 on Software RAID.

With old kernel (2.6.9-34.0.2) the system boot normally.

Any idea what is error?

Best regards

Heitor Augusto