Error:- HTTP/S connection failed for ITS

Dear Gurus,

I have created a CRM system.

In which I have given ITS Host name & Path.

When I enter the parameters as a URL in the browser (i.e. http://<host name: port>/<ITS Path>), the ITS System Information page gets open. It means that the values for the host name & path are correct.

But when I try to check the Connection Test for ITS, it fails & gives the error as: - <b>HTTP/S connection failed</b>.

When I changed the SAP GUI Type from WinGui to WebGui and checked the preview of the iView, the error message it showed as:-

<b>ITS System Information</b>

<b>No Service Name Specified</b>

Your request did not contain a service name. Please provide a service name as part of the URL.

Example URL:

http://.../scripts/wgate/CreateSO/!

or...

<b>Session Already Terminated</b>

There is currently no session running that might accept this request.

This situation usually occurs if your session has been closed by the Internet Transaction Server and you tried to navigate to a previously requested page by selecting BACK in your browser. To proceed you must first restart the session as described above.

Please tell me what are the other settings that I should check?

Thanks.