2.6 Kernel and LVM

Has anyone successfully upgraded to a 2.6 kernel while using LVM? I upgraded using the 2.6.1 rpm (the kraxel rpm). My mkinitrd was already a higher version, and I installed some LVM2 rpms. When I boot to the 2.6 kernel I am unable to mount any of my LV's. vgscan and lvscan both display everything, but if I try to mount anything I get an error "mount: /dev/Volume00/lvusr is not a valid block device". lsmod shows that dm_mod is running, but I can't seem to locate an lvm module in the /lib/modules/2.6.1-3-default. Can anyone tell me what I am missing and what I need to do in order to correct this? Thanks, Dan Dan