ASA 5515x and Certificate

I am trying to use certificate based and AAA based authentication for my clientless vpn.  I went through Entrust and finally received my certificate; however, when I verify my domain using their site, I receive the following message "the hostname (mydomain.com (changed)) is not found in the certificate.  Is this because the host name and domain name I have assigned to the asa are not mydomain.com?  If this is the case, if I change my hostname will this affect anything else.  I currently have a Site to Site VPN tunnel; however it is not based on certificate authentication.  Any advice is appreciated.
krhoades7601Asked:
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Pete LongTechnical ConsultantCommented:
>>Is this because the host name and domain name I have assigned to the asa are not mydomain.com?  

Possibly, before you change the the domain name on the asa do the following

crypto key zeroize
domain-name your-actual-domain.com
crypto key gen rsa modulus 2048

Then try again
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