Hello Joan,
Using failover, importing a PCKS12 certificate file into the ASA using ASDM does not create the private key on the secondary unit:
Is this a third party certificate? If yes you need to import it manually to the secondary box
Using failover, importing the AnyConnect profile file (instead of generating it from the template file in ASDM) does not replicate it on the secondary unit.
Anyconnect Profiles do not replicate to the secondary unit, You need to do it manually.
When configuring the ASA in a failover pair you must manually copy the AnyConnect and CSD images to both the Primary and Secondary ASA devices. You must also do the same for the Anyconnect profile file if it is being used.
Either force the standby ASA to become active and copy the files to the new active ASA using ASDM or copy the files directly from the standby ASA console using tftp or ftp.
Hope I could help,
Julio
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Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC