After record a test case using HTTP Tunnel, it fails to run

Hi all,

I want to record an HTTPS traffic and re-run. The steps I took are:
1) Launch HTTP monitor and choose HTTP Tunnel.
2) For "set endpoint for HTTP tunnel", input "http://my test domain: port". And add certificates in key store.
3) Open IE and launch "http://127.0.0.1:8081", then it redirected to my test domain. I did some clicks on the website. And there are 6 items of traffic generated in HTTP monitor.
4) Choose the 6 items and select "add to a test case".
5) Open the test case and click run.
Test step 1 fails without a response or error message.
I also tried run the test case while HTTP monitor is in running state, it still doesn't work.

Could some one indicate me what's the correct step to run a test case that is recorded by HTTP tunnel?

Thanks very much!