Radius Manager and RB1100AHx2

Hi there! We have an old radius manager served off an ubuntu OS and an interface of our RB1100AHx2 and is accessible from our LAN on a different interface as well as accessible remotely and anywhere on our customer network. We have now got a new radius manager served off a centos 6.4 OS on exactly the same interface as the old one and with exactly the same IP address as the old one and is accessible remotely and from anywhere on our customer network BUT is not accessible from our LAN. Our Core Router RB1100AHx2 does not show the address to it as a next hop??? just something I noticed. Am I missing something here?