Contivity 600 changing interface and management address ?? HELP??

Hello everyone,

I've got this contivity 600 vpn with an Interface address of

I want to change the interface and management addresses to: Interface

Everytime I try to change the management address it says it cant because it is out of range of the interface address and when I try to change the interface address it says that the management address needs to be in the correct subnet.

Any ideas how I can get both of these to change?

Right now I connect through ethernet on a computer with an ip of

thanks