Inter lan connection

in CCNA & CCENT
The link below has a file of pkt version 6.2. It depicts 4 lans connected via farme relay cloud. One lan is ISP demo. it is 6.0.0.0 A class network.Other lans are private C. Only the ISP can't connect with the other lan , all the other can connect to each other.
Why?
router pass is 209951
https://drive.google.com/open?id=0B-wqkAUoafjDLUUwZDJDMUZFVjA
Why?
router pass is 209951
https://drive.google.com/open?id=0B-wqkAUoafjDLUUwZDJDMUZFVjA
Comments
CCNP R/S