部署失败:CLR触发器

我试图部署在.Net 4.0上构建的CLR触发器，但将目标框架更改为3.0，但我收到了以下错误消息。

------部署已启动：项目：ServiceClient，配置：调试任何CPU------2012年1月18日下午2:16:24开始建造。SqlClr部署：开始将程序集ServiceClient.dll部署到服务器WS037298:custDB如果部署的SQL CLR项目是为与SQL Server的目标实例不兼容的.NET Framework版本生成的，则可能会出现以下错误："部署错误SQL01268:CREATE ASSEMBLY for ASSEMBLY失败，因为ASSEMBLY验证失败"。若要解决此问题，请打开项目的属性，然后更改.NET Framework版本。部署脚本生成为：D： ''Visual Studio 2010''Projects''ServiceClient''ServiceClient''bin''Debug''ServiceClient.sql

正在创建[ServiceClient]。。。D： ''Visual Studio 2010''Projects''ServiceClient''ServiceClient''bin''Debug''ServiceClient.sql（39-39）：在sql目录中找不到部署错误SQL01268:.Net SqlClient数据提供程序：Msg 6503，级别16，状态12，第1行程序集"system.servicemodel，版本=3.0.0.0，区域性=中性，公钥令牌=b77a5c561934e089."。执行批处理时出错。

生成失败。

运行时间00:00:24.64===========生成：1成功或最新，0失败，0跳过====================部署：0成功，1失败，0跳过==========

public partial class Triggers
{
    //Create an endpoint addresss for our serivce
    public static EndpointAddress endpoint =
      new EndpointAddress(new Uri("http://localhost:8000/services/myservice"));
    //Create a binding method for our service
    public static WSHttpBinding httpBinding = new WSHttpBinding();
    //Create an instance of the service proxy
    public static ServiceClient.ServiceReference1.ServiceContractClient myclient = new ServiceClient.ServiceReference1.ServiceContractClient(httpBinding, endpoint);
//    public static ServiceClient.localhost.ServiceContractClient myClient = new ServiceClient.localhost.ServiceContractClient(httpBinding, endpoint);
    //A delegate that is used to asynchrounously talk
    //to the service when using the FAST METHOD
    public delegate void MyDelagate(String crudType);

    [SqlProcedure()]
    public static void SendData(String crudType)
    {
        /*A very simple procedure that accepts a string parameter 
          based on the CRUD action performed by the
          trigger. It switches based on this parameter 
          and calls the appropriate method on the service proxy*/
        switch (crudType)
        {
            case "Update":
                myclient.UpdateOccured();
                break;
            case "Insert":
                myclient.InsertOccured();
                break;
        }
    }
    [Microsoft.SqlServer.Server.SqlTrigger(Name = "WCFTrigger",
       Target = "tbCR", Event = "FOR UPDATE, INSERT")]
    public static void Trigger1()
    {
        /*This is a very basic trigger that performs two very simple actions:
         * 1) Gets the current trigger Context
         *    and then switches based on the triggeraction
         * 2) Makes a call to a stored procedure
         * Two methods of calling the stored procedure are presented here. 
         * View the article on Code Project for a discussion on these methods
         */
        SqlTriggerContext myContext = SqlContext.TriggerContext;
        //Used for the FAST METHOD
        MyDelagate d;
        switch (myContext.TriggerAction)
        {
            case TriggerAction.Update:
                //Slow method - NOT REMCOMMEND IN PRODUCTION!
                SendData("Update");
                //Fast method - STRONGLY RECOMMENDED FOR PRODUCTION!
                //d = new MyDelagate(SendData);
                //d.BeginInvoke("Update",null,null);
                break;
            case TriggerAction.Insert:
                //Slow method - NOT REMCOMMEND IN PRODUCTION!
                SendData("Insert");
                //Fast method - STRONGLY RECOMMENDED FOR PRODUCTION!
                //d = new MyDelagate(SendData);
                //d.BeginInvoke("Insert", null, null);
                break;
        }
    }