Changing Report Header Text using ModelStrings.ini

Question

I have edited the string&nbsp;RPT_HEADER_SERIAL_NUMBER = "Tag/Serial Number: " (Formerly "Serial Number") but it doesn't change the report. I am using AMTL5 horizontal.&nbsp; I tried to use the Modify HEader callback but the report header text variable doesn't have the full text of the Header just some properties.
Example:
"&lt;trc:TestResults uuid="8fb00b4c-f1ac-11ec-a297-c400ad214c17" xmlns:trc="urn:IEEE-1636.1:2011:01:TestResultsCollection" xmlns:tr="urn:IEEE-1636.1:2011:01:TestResults" xmlns:c="urn:IEEE-1671:2010:Common" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ts="www.ni.com/TestStand/ATMLTestResults/2.0"&gt;&lt;tr:Personnel&gt;&lt;tr:SystemOperator ID = "administrator" name = "administrator"/&gt;&lt;/tr:Personnel&gt;&lt;tr:ResultSet ID="1952" name = "C:\Projects\FCAS_Automated\branches\Actuator ESS Tests\FCAS ESS.seq#MainSequence" startDateTime = "2022-06-21T17:53:19.811" endDateTime = "2022-06-21T17:53:19.811"&gt;&lt;tr:Extension&gt;&lt;ts:TSStepProperties&gt;&lt;ts:StepType&gt;SequenceCall&lt;/ts:StepType&gt;&lt;ts:StepGroup&gt;Main&lt;/ts:StepGroup&gt;&lt;ts:BlockLevel value='1'/&gt;&lt;ts:Index value='10'/&gt;&lt;ts:TotalTime value='0'/&gt;&lt;ts:ModuleTime value='0'/&gt;&lt;/ts:TSStepProperties&gt;&lt;/tr:Extension&gt;&lt;tr:Outcome value="UserDefined" qualifier="Running" /&gt;"
Any help to change this text/label would be appreciated.
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Thanks
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NI TestStand

Changing Report Header Text using ModelStrings.ini