This error is related to SELinix - to get this to work I ran the following commandes on the problematic host then restarted xinetd:
These are the commands to pass to SELinux
chcon -t textrel_shlib_t /usr/openv/lib/libnbmangle.so
chcon -t textrel_shlib_t /usr/openv/lib/libvxPBXCommon.so
chcon -t textrel_shlib_t /usr/openv/lib/libvxPBX.so
chcon -t textrel_shlib_t /usr/openv/lib/libvxPBXVxSS.so
chcon -t textrel_shlib_t /usr/openv/lib/libvxVxSSIOP.so
chcon -t textrel_shlib_t /usr/openv/lib/libnbservice.so
Run these commands as root then restart xinetd
/etc/init.d/xinetd stop
/etc/init.d/xinetd start
w00t