Ping Standby ASA IP

Recently taken over an ASA pair running active/standby. I did a failover test but noticed that the primary IP did not follow to the secondary unit when i failed over from the primary.

Primary IP - x.53

Secondary IP - x.54

When i failed over to secondary, i thought the x.53 IP should have followed it over? instead i had to access them via .54

Am i missing something or just being silly?

If i run the following on the primary unit:

#failover exec standby show interface

then the management interface on the standby unit shows:

Interface Management1/1 "MGMT", is down, line protocol is down

EDIT:

Think ive found the reason:

Management Port Configuration Changes

The  ASA 5500-X Series introduced a shared management port for firewall and  IPS services.,There are certain caveats to follow during migration from  the ASA 5500 Series.

•  The shared management port cannot be used as a data port. All  through-the-box traffic arriving at the management port will be dropped  implicitly. This cannot be disabled.

• The shared management port cannot be used as a part of a high availability configuration.