Not able to update XML value in Change mode (without admin rights) - wix

Question

I have written following code in my wix installer for updating the language in an XML file and this works fine in following conditions:
1) fresh install
2) upgrade by using admin rights (I am using msiexec /I "Tools.msi" /l*v D:\InstallLog.txt).
However, when I run/execute the msi without admin rights (This is where "Change" mode is being used....what am I missing) the values are not updating always set to the default value :
<Property Id="LANGUAGE" Value="en-US" />
The code:
<util:XmlFile Id="LanguageConfig"
Value="[LANGUAGE]"
ElementPath="/configuration/appSettings/add[\[]#key='Language'[\]]"
Action="setValue"
File="$(var.ConfigFile)"
Name="value" Sequence="1" />
<util:XmlFile Id="MappingLanguageXML"
Value="[LANGUAGE]"
ElementPath="/MappedUsers/UsersList/UserID/LanguageCode"
Action="setValue"
File="$(var.UserMappingFile)" Sequence="1" />
Any help is much appreciated.

Answer 1

The fact that it's being changed implies it may not be a privilege issue. I suspect that the scenario is that a different language was entered at install time, but you did not preserve its value anywhere so Change just uses the default value. Properties aren't remembered automatically, that's what the WiX "remember property" pattern is for. That's likely to be the solution - preserve the install time value of LANGUAGE. It's no different from running any program - the fact that the user may have entered something that went into a variable doesn't mean that the variable will have that same value next time you run the program unless you save it.

Answer 2

Based on PhilDw pointer I solved the issue by modifying my property
<Property Id="LANGUAGE" Value="en-US" />
as follows:
<Property Id="LANGUAGE" Secure="yes" Value="en-US">
<RegistrySearch Id="RememberLanguage" Root="HKLM"
Key="$(var.RegistryLoc)"
Name="Language" Type="raw" />
</Property>
By preserving the value in the registry I was able to modify the value during "Change" operation.