That is a known issue with acs appliance, but nothing to worry about. Make sure you have this setting in acs,
acs--->network configuration--->Proxy dis table---> Bring Deleverance1 in the fwd to box and your server name in the left box.
Incase you dont see proxy dis table , then you need to enable it
Interface configuration---> Advance option ---> Put a check in distribution table.
Regards,
~JG
Please do rate helpful posts