ASA Radius auth

Hi,

A question about WB section 4, lab 3, ASA with Radius. 

If I use the command 'aaa authorization exec authentication-server' I get: '[ ADM ] You do NOT have Admin Rights to the console !' when I try to login with user ADM and CON. user PRIV4 works.

If I remove the command everything works as it should.

Anyone see the same, or could explain a bit deeper about the command, how to get it to work?

From 8.4  CLI guide:

I found a post on OSL about the same problem, but no explanation :-)

Cheers