Passing DevOps Test Case parameters to Test Complete

Hi,
We are using on-prem  Azure DevOps Server 2020 Update 1.2 with Test Complete 

I have created a Test Case in DevOps that has two parameters:

I am running the Test Case from a Test Suite with a pipeline using the Test Complete Test adaptor passing them on the command line to Temporary project variables defined in Test Complete:

/PrjVar:p1=$(TestCase.p1) /PrjVar:p2=$(TestCase.p2)

However in Test Complete the values are being shown as:

$(TestCase.p1) and $(TestCase.p2)

and the parameters are not being passed correctly.

Does anyone know if this is possible and if so any hints would be greatly appreciated.

I have tried all sorts of combinations without success.

Many Thanks in anticipation.

Kind Regards
Dave