How to make Fitnesse fork a new process for every test when run the suite

I am using Fit library with custom fixtures. I see that it is the same SUT java process exists for all of the tests under the test suite. Each of the tests in suite is a making a connection to the TcpServer. If run as a suite I see the port blocked and address bind issues for the consequent tests. I tried to work with introducing Sleep between the tests, that did not help.

I want to know how can I run the suite in a way where each test run is run in a new process ?