update/upgrade 2.6 to 2.7 dom0

Hello,

I did a update/upgrade of alpine-xen version 2.6 to 2.7 but got that failure:

dom01:~# xl info
host : dom01
release : 3.10.17-1-grsec
version : #2-Alpine SMP Wed Oct 23 14:29:15 UTC 2013
machine : x86_64
libxl: error: libxl.c:3938:libxl_get_physinfo: getting physinfo: Permission denied
libxl_physinfo failed.
libxl: error: libxl.c:4320:libxl_get_scheduler: getting domain info list: Permission denied
xen_major : 4
xen_minor : 2
xen_extra : .2
xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler : (null)
xen_pagesize : 4096
platform_params : virt_start=0xffff800000000000
xen_changeset : unavailable
xen_commandline : dom0_mem=512M,max:512M loglvl=all guest_loglvl=all allowsuperpages
cc_compiler : gcc (Alpine 4.7.3) 4.7.3
cc_compile_by : buildozer
cc_compile_domain : [unknown]
cc_compile_date : Tue Sep 3 06:48:35 UTC 2013
xend_config_format : 4

dom01:~# xl list
libxl: error: libxl.c:557:libxl_list_domain: geting domain info list: Permission denied
libxl_domain_infolist failed.

dom01:~# cat /etc/alpine-release
2.7.1

What's going wrong here?