Access to uCMDB 10.20 using logical ip

Hello all,
I have installed uCMDB 10.20 on windows 2012 servers.

When I access using physcal ip of server I don't have problems.

When I try using logical ip, I can only put the credentials, but access doesn't work. 
In additional, I don't have any error message (access denied o wrong credentials), I remain in the same page to insert credentials.

 

Is there any configuration I need to do to allow the access also from logical?

 

Thanks in advance,

Giuseppe