What is limiting the # of simultaneous connections my ASP.NET application can make to a web service?
See the question and my original answer on StackOverflowHave you tried to set the value of the static DefaultConnectionLimit property programmatically?
Here is a good source of information about that true headache... ASP.NET Thread Usage on IIS 7.5, IIS 7.0, and IIS 6.0, with updates for framework 4.0.