I have an inhouse(NY) app that cients can upload files to. Usually uploads go pretty quickly for most clients but this particularly cient in the UK always have problems with uploads. not sure if they get any errors but since we log all exceptions, we see this...Error: System.Web.HttpUnhandledException: Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.Net.WebException: The operation has timed out at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request) at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request) at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) at ... This shouldn't even be an issue because since we noticed they have had this issue before so we bumped up these to maxRequestLength="2097151" executionTimeout="14400". Further investigating this error, i read that it could be a thread timeout since the default is 20minute. A worker process with process id of serving application pool was shutdown due to inactivity. Application Pool timeout configuration was set to 20 minutes. A new worker process will be started when needed. Problem is I am not entirely sure if that really is the case as all other cients mostly North American, have no issues but then their uploads don't seem to go beyond 80mb and the UK client have done a 700mb upload before that i know of. We have tested 750mb before and the whole process took about 15min for upload and processing. Any help on what the real issue here might be? Thanks.