I try 4 to 4 work using VIP, able to ping VIP.

I try 6 to 6 work using VIP, able to ping VIP. But i try 6 to 4 cannot work using VIP, i was not able to ping Virtual IP i set on 6 to 4. (i trying to achieve one to one mapping for 6 to 4)

I also use IP pool on 6 to 4 policy but i was not able to remote access/ping to IPv4 network. Anyone have the solution to this?