无法发送到webservice接口

lucktest

vuser_init()
{
char buf[1000];
strcpy(buf,"<provision_order> <requestMethod name=\"set-ngn-addinfo\">");
lr_output_message("%s",buf);
return 0;
        web_service_call( "StepName=sendOrder_104",
                "SOAPMethod=OrderReceiverService.OrderReceiver.sendOrder",
                "ResponseParam=response",
                "WSDL=F:/myself/zznode/loadrrnner/33OrderReceiver.wsdl",
                "Snapshot=t1214895461.inf",
                BEGIN_ARGUMENTS,
                "orderClass=VOC",
                "orderString={buf}",
                END_ARGUMENTS,
                BEGIN_RESULT,
                END_RESULT,
                LAST);
        lr_think_time(3);
        return 0;
}

运行结果:
Virtual User Script started
Starting action vuser_init.
vuser_init.c(5): <provision_order> <requestMethod name="set-ngn-addinfo">
Ending action vuser_init.
Running Vuser...
Starting iteration 1.
Starting action Action.
Ending action Action.
Ending iteration 1.
Ending Vuser...
Starting action vuser_end.
Ending action vuser_end.
Vuser Terminated.

但为什么调不到webservice接口
而"orderString=1111\"aa\"bb";却可以成功
但"orderString=1111\"<aa>\"bb";有尖括号的也不能成功

编译都是通过的

lucktest

不用以下4行；
char buf[1000];
strcpy(buf,"<provision_order> <requestMethod name=\"set-ngn-addinfo\">");
lr_output_message("%s",buf);
return 0;
直接"orderString=1111\"aa\"bb";却可以成功
"orderString=1111\"<aa>\"bb";有尖括号的也不能成功