Issue while Linking a Test Case in RQM with a requirement in RRC

 We are using version 4.0.3 of rational quality manager and rational requirement management. We require to link the test case with requirement during the upload.  Please share solution if anyone has tried. Please find below options we have tried:

> We are unable to use the check box Link to existing RM requirement present in Rational Quality Manager Excel/Word Importer as the number of requirements are 5000+.

> We are looking if there is a parameter in config which we require to set. Below is the config file which we are using

// Defines the first row containing a Test Script Step

testscript.XLSStartRow=4            

// Defines the delimeter between rows

testscript.XLSDelimeter=\n

// Defines the cell containing the Test Script Name

testscript.dc:title=C1

// Defines the cell containing the link to the Test Case

testscript.testcase=LinkExisting(D1)

// Defines the type of each Test Script Step

testscript.steps.type="execution"

// Defines the column containing the Step's Description

testscript.steps.description=B

// Defines the column containing the Step's Expected Results

testscript.steps.expectedResult=C

// Defines the unique External ID which is used to determine which record to create/update in Rational

testscript.XLSArtifactID="Test Script for " & C1

where D1 = urn:com.ibm.rqm:testcase:<Test case #>

We have tried adding below code after referring below link, But requirement are not mapped to the test case.

testcase.requirement=Link(A)

https://jazz.net/forum/questions/96160/linking-a-test-case-in-rqm-with-a-requirement-in-rrc 

https://jazz.net/forum/questions/54701/need-cfg-file-to-import-test-cases-and-link-existing-require?page=1&focusedAnswerId=239733#239733