Hi Arkuadiusz,
It seems that you are running a German OS. If that is the case try to switch your Regional and Language Settings to English and rerun the "Installationsbereitschaft erneut prüfen". If this doesn´t solve the CRL error try the following:
To enable the Next button if any of the install Readiness checks fail:
Add the key HKEY_LOCAL_MACHINE\SOFTWARE\Altiris\AIM\InstallReadinessCheck\
to the registry. Create a DWord called EnableNextbutton and set the value
to 1.
The second is not a real solution it´s more a workaround...
Hope this helps.
Network23