asp.net – 从IIS6向IIS7.5移动AJAX调用,在System.Web.Handlers.

<System.Web.Services.WebMethod()> _
Public Shared Sub EmailManagers()
    'code
End Sub

使用这样的AJAX调用：

function EmailManagers_Click() {
        alert('staring email send');
        $.ajax({
                type: "POST",//url: "EACApprovalOverview.aspx/EmailManagers(" + document.URL + ")",url: "EACApprovalOverview.aspx/EmailManagers",data: "{}",contentType: "application/json; charset=utf-8",dataType: "json",success: function (msg) {
                    alert("Emails Sent!");
                },fail: function (msg) {
                    alert("Email Send Failed!");
                }
            });
        alert('end email send');
        return false;
    };

当我在Win2008Srv上的IIS7.5下运行此应用程序时,我得到“对象引用未设置为对象的实例”.这是堆栈跟踪：

[NullReferenceException: Object reference not set to an instance of an object.]
   System.Web.Handlers.ScriptModule.OnPostAcquireRequestState(Object sender,EventArgs eventArgs) +162
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +68
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step,Boolean& completedSynchronously) +75

我在帖子中看到的其他错误在堆栈跟踪的顶部包含一个额外的行,如下所示：

at System.Web.Script.Services.WebServiceData.GetMethodData(String methodName)
   at System.Web.Handlers.ScriptModule.OnPostAcquireRequestState(Object sender,EventArgs eventArgs)
   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step,Boolean& completedSynchronously)

由于我没有进入WebServiceData.GetMethodData调用,我猜测System.Web.Handlers未正确加载,导致ScriptModule为null.

我在web.config中有这个：

<httpModules>
  <add name="ScriptModule" type="System.Web.Handlers.ScriptModule,System.Web.Extensions,Version=3.5.0.0,Culture=neutral,PublicKeyToken=31BF3856AD364E35"/>
</httpModules>

我确保安装了.net 3.5 sp1.我甚至检查了GAC,dll就在那里.我在俯瞰什么？