I think you wil need to contact your basis administrator team for this. It sounds to me like the system you are testing from is not allowed to communicate with SAP (qe1tipl.tiplindia.com:8000).
I base this purely on the message that is given. I might be wrong though.
Please contact your basis team for this message.
Also which tool are you using to test the web service ?
And are you sure the data in your request is correct ? I see values like "String 4" and "Cause Comments". Are you absolutely sure that these values (and all other values in your request) can be handled by your RFC function module ?
And a last remark is that according to your error details you are communicating with a quality system QE1/300. Is that correct ? Did you transport the RFC to quality an did you create a logical port in system QE1/300 ?