can anybody verify that inserting new Items through SharePoint Webservice Method Lists.UpdateListItems is errornous?
I always get the Error:
0x80070057Bad parameter passed to Web Server Extensions. Check the information you entered and try again.
The error in here is self explanatory you might given the web service method an incorrect parameter. UpdatelistItems method requires a batch parameter and the list name to make it work. it really is not that simple to create the batch parameter but for quick reference please find this Link