IP problem after upgrading plesk

[webjfg]

Hi
i have a problem with my IP adresse
i have upgrade from 11 to 12 on centos 6.5
i have 4 IP adresse (IPv4)
when i check on my plesk panel i see all of my 4 adresse
but when i do a ifconfig i only see 3 adresse.
if i try to delete (on plesk) the entry don't show on the ifconfig i receive this error
" String was provided for unescaped parameter host. "

also if i use the re-read IP adresse (sorry my panel is in french i don't have the exacte word in english) i have an error
message saying (in french) "Des valeurs incorrectes ont été indiquées pour l'enregistrement DNS."
in english it should be incorect value for DNS record)

thank you

Jean-Francois Garand
webjfg.com