Hi Celalettin,
Here's what you need to do:
1. Double-click the needed task node in the Project Explorer panel.
2. Select the problematic request you're interested in.
3. Enable the "Raise Events" option on the Request and Response tabs. This will make TestComplete generate the corresponding events when the request is sent and when a response is received.
4. The request ID is shown in the task editor ("Request XXXX", where XXXX is the request ID).
5. If you face some problems with the script execution, set a breakpoint in the event handler, start debugging and examine the actual values of the needed variables in the Watch panel or the Evaluate dialog.
