dc+ error with ports mapping in nat traversal on adc protocol

I created a hubdc witch adch++ 2.81 on linux

I tried it in our university campus where we have NAT ( IPs 192.168.0.1/255) passive
mode is the only option.
After some checking I saw this
http://www.brynosaurus.com/pub/net/p2pnat/img9.png
I am in this situation and works well

But the next situation does not work

http://www.brynosaurus.com/pub/net/p2pnat/img8.png
what settings should be made ​​to work?
something can be done to work ?

my email address is <email address hidden>
Send me an email pls

some information : http://www.brynosaurus.com/pub/net/p2pnat/

excuse me but my English is not very good

hub isn't on the private network, is on internet is have an ip 86.123.234.248

are 2 university campus, each having a server used as rooter for the private network inside each campus (IP 192.168.0.1/255)

server ip university campuses are 193.231.40.44/45
passive mode is the only option to connect to the hub and to download from other users outside the campus
users on the private network within a campus can not downlad each other using passive mode
hub is made just for the two campuses
passive mode and NAT traversal allows users to connect from one campus to campus but not inside two private networks within campuses

mode active allows connecting users within the private network on campus 1 and not allow users to connect to the campus 2
http://img109.imageshack.us/img109/9308/63413713.png

Green Line allows connection
The red line does not allow connection

pls contact me with a solution