Error: xpSLS.dll not installed <date and time stamp> RegisterLicense returned an error duri (4223040)

Silent Installation is run by using command line when both the .msi and .xml files are within the directory: 

msiexec /i litespeed2005.msi /qn /l*v litespeed2005.log SILENTINSTALLXML=litespeedconfiguration.xml

Error: xpSLS.dll not installed may be reported

The installer uses embedded license key, requiring user to enter the license key in the XML

The Binn path code should be entered underneath the <SQLServiceName> field. This requires an individual path for each instance to be installed.

<SQLServiceName>MSSQLSERVER</SQLServiceName>

<BinnPath><![CDATA[insert SQL Server instance Binn path here]]></BinnPath>

<Statistics>>!]

Also see Installation Guide available at Quest.com Supportlink.