I've never seen this before. Did you get this resolved? If not you can disable the check:
To disable the check for SIM prerequisites:
Add the key HKEY_LOCAL_MACHINE\SOFTWARE\Altiris\AIM to the registry.
Create a DWord called IgnoreInstallPrerequisites and set the value to 1.
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.