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Cannot access ASDM with Cisco ASA 5506-X

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Last Modified: 2016-08-09
Hi I just purchased a Cisco ASA 5506-X, I am able to ping it and access it through the console CLI, but not with ASDM. The device is new and carries the default factory-configuration.

First i tried ASDM from a Windows 7 workstation with different browsers (IE Firefox and Chrome) but all of them reported an unsecure connection and refused to connect.
Then I tried from an old Windows XP with IE 8, in this case I can open the initial page where I am given the choice to Install ASDM launcher, Run ASDM or Run startup wizard.
If i try "Run ASDM" or "Run Startup wizard" i receive the message: Internet Explorer cannot download asdm.jnlp (or startup.jnlp) from 192.168.1.1

I am able to install the ASDM launcher on the local machine, however, if I try to use it to access the ASA I am prompt for username and password (which I haven't configured yet), no matter what I use as username and password (I tried with blank, cisco-cisco, Cisco-Cisco, cisco-Cisco) I always receive the message that "Unable to launch device manager from 192.168.1.1.

I already tried the following commands from CLI:
conf t
ssl encryption rc4-sha1 aes128-sha1 aes256-sha1 3des-sha1
ERROR: % Invalid input detected at '^' marker.

Could you please let me know what I am doing wrong?
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