If @LServer is returning '', then the 'key' gets deleted in the ini file.
code:
dim $IniFile,$IniSection,$IniKey,$IniStr
;
$IniFile="c:\temp\test.ini"
$IniSection="LogonServer"
$IniKey="Servers"
$IniStr=@Lserver
;
$IniFile?
$IniSection?
$IniKey?
$IniStr?
;
If Exist($IniFile)
   $rc=writeprofilestring($Inifile,$IniSection,$IniKey,$IniStr)
   If $rc=0
      "Function success"?
   Else
      "Function failure "+@error+" "+@serror?
   EndIf
Else
   "Ini file not found"?
EndIF
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