SLES11 SP4 Xen Paravirtual VMs multipath problem

I have SLES 11 SP4 Xen server with two paravirtualized VMs (PVMs) with SLE-10-x86_64-SP3 and OES v.2.0.2.
Multipath is configured for 2 LAN interfaces (different subnets) connected to LIO ISCSI target.
multipath.conf is:

[CODE]defaults {
user_friendly_names yes

blacklist {
devnode “^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]"
devnode “^hd[a-z]”
devnode "^dcssblk[0-9]


devices {
device {
vendor “LIO-ORG”
features “2 queue_if_no_path no_partitions”
path_selector “round-robin 0”
path_grouping_policy multibus
failback immediate
path_checker “tur”
prio “alua”
For HVMs I had to add there this line

features "2 queue_if_no_path no_partitions"
otherwise the HVMs didn’t start.
If I keep this line for PVMs, I get libvirt error and the PVMs don’t start.
If I comment this line, the PVMs start and are waiting for root partition to appear with no success.