LVM Can't find PV after upgrade

hey guys I need some help!

I got two servers sharing an external scsi enclosure.
First is a Suse 9.1 with lvm version:
LVM version: 2.00.15 (2004-04-19)
Library version: 1.00.09-ioctl (2004-03-31)
Driver version: 4.4.0

Second is an OpenSUSE 11.1 with lvm version:
LVM version: 2.02.45 (2009-03-03)
Library version: 1.02.31 (2009-03-03)
Driver version: 4.14.0

LVM works fine on the first server but PVs wont be find when pvscan on OpenSUSE.

Here’s the pvscan -vvv output:
Opened /dev/sda RO
/dev/sda: size is 1248190464 sectors
WARNING: /dev/sda already opened read-only
/dev/sda: Immediate close attempt while still referenced
Closed /dev/sda
Opened /dev/sda RW O_DIRECT
/dev/sda: block size is 4096 bytes
/dev/sda: Skipping: Partition table signature found
Closed /dev/sda

No matching physical volumes found

Any ideas?