Why license key does not detect when running unit test in jenkins slave

I install isolator++ for C++ 3.5 version to a windows server which is a jenkins slave. I also run configuration tool to set the license key.

When I try to run unit test from jenkins slave server within the jenkins job, then I got error:

14:20:24 ************ Typemock Isolator++ Notice *************

14:20:24 Invalid license key detected!

14:20:24 Please enter a valid license using Configration.exe 

14:20:24 

However, if I logged in to jenkins slave server and locally run the same command like in the jenkins job, then it works.  

Can you please help on what I missed on the setup?

this is the commandline that I have tried to run unit tests that are using typemock:

.xxxsourceSoftwareBonusbcUTbcTestDebugbcTest.exe --gtest_output=xml:.UnitTestOutput.xml

thanks