we identified that there is an issue with fault injection api in the new testapi 0.6 version. while we are working on the fix, please use previous version (v0.5), which worked fine.
note: if you already use or registed 0.6 faultinjectionengine.dll, please use the following command to clean it up before use v0.5.
in command window (run as adminsitrator), goes to folder having faultinjectionengine.dll and run: regsvr32 -u faultinjectionengine.dll
then you should good to go.