[Xymon] Error on OpenVZ Debian guest : Cannot find /proc/XXXXX - is /proc mounted?

Hi,

I'm trying to run XYmon on a virtualized openVZ Debian 7 and I have those errors :

Cannot find /proc/version - is /proc mounted?
cat: /proc/filesystems: Permission denied
df: option requires an argument -- 'x'
Try `df --help' for more information.
Cannot find /proc/version - is /proc mounted?
Cannot find /proc/version - is /proc mounted?
Cannot find /proc/version - is /proc mounted?

Any chance I could use XYmon to monitoring this server ?

-- LMJ "May the source be with you my young padawan"