[WiX-users] Wix 3.8 - Burn - DetectCondition string compare syntax

[froggie <fro...@to...>]

Hi!
I'm trying to do a string compare in a DetectCondition. According to the 
log the syntax is wrong.
But what is the correct syntax?

What I want: Check wether a registry value is exact a given value (string).

Log-message:
Error 0. Failed to parse condition GOTO_ASSISTEXISTS = My Company name. 
Unexpected symbol at position (null)

My code:

<?define GoToAssistExpertName = "My Company name" ?>

  <util:RegistrySearch
       Id="Goto_AssistExists"
       Variable="GOTO_ASSISTEXISTS"
       Root="HKLM"
       Key="Software\Citrix\GoToAssist Express Customer\User"
       Value="ExpertName"
       Format="raw"
       Result="value" />

       <ExePackage Id="Goto_Assist"
                   DisplayName="Remote help"
SourceFile="..\..\..\data\g2a_rs_installer_my_company_name.exe"
                   DetectCondition="GOTO_ASSISTEXISTS = 
$(var.GoToAssistExpertName)"
                   Compressed="yes"/>