How to track web request made to sharepoint site from remote computer

I am trying to connect IBM datastage application to a sharepoint list using soap web services. I am using GetList and Getlistitems to get the data from sharepoint list. While doing this i can sucessfully connect using Getlist function , but getlistitems its throwing the error.

Now i was wondering if there is a way to track the responce made by the IBM Datastage upon my SharePoint Farm. I checked the trace logs, i cant find any trace there.

Where would i find such information to make sure connection between sharepoint server and IBM datastage has been made sucessfully.

Thank you