web_reg_find在脚本中的的摆放问题

我把 web_reg_find( "Text=OMS4.0", "Search=body", LAST );这句函数放在web_submit_data("login.aspx", ....）函数中，在回放的时候总是出错，但是把web_reg_find( "Text=OMS4.0", "Search=body", LAST );放在web_submit_data之后却可以正常回放，为什么？不是说添加检查点函数web_reg_find要在web_submit_data()函数前吗，怎么我放在该函数前出错了，反而放在该函数之后不会出错

我的代码如下

vuser_init()
{

 web_add_cookie(".ASPXAUTH=D9AC3CDCA5AB83080847FAE39754F2A146A362130B8942A5B25299E7D5C8BCB803501D5994B554F2021C20015B7F13905BD85F8075063BA577673C3A447BEC6259C1D0BF10779BAE3D4C198E7F1B8BF2; DOMAIN=192.168.1.96");

 web_set_max_html_param_len("16400");

 web_reg_save_param("Siebel_Analytic_ViewState2",
  "LB/IC=ViewState\" value=\"",
  "RB/IC=\"",
  "Ord=1",
  "Search=Body",
  "RelFrameId=1",
  LAST);

 web_url("yzw",
  "URL=http://192.168.1.96/yzw",
  "Resource=0",
  "RecContentType=text/html",
  "Referer=",
  "Snapshot=t1.inf",
  "Mode=HTML",
  EXTRARES,
  "Url=/yzw/WebResource.axd?d=Sfnjd6t54dOKEmIjzK6dOQ2&t=634027746547968750", "Referer=http://192.168.1.96/yzw/", ENDITEM,
  "Url=/yzw/WebResource.axd?d=Zxseq4G2f6hd_s3IYcsmjXjt-sFtHuKkAarVF2xycG81&t=634027746547968750", "Referer=http://192.168.1.96/yzw/", ENDITEM,
  LAST);

 web_add_cookie("BAIDUID=72AA9D5CAE1DAB5BE8775AD6D9445439:FG=1; DOMAIN=l.baidu.com");

  lr_start_transaction("gg");

 web_reg_save_param("Siebel_Analytic_ViewState4",
  "LB/IC=ViewState\" value=\"",
  "RB/IC=\"",
  "Ord=1",
  "Search=Body",
  "RelFrameId=1",
  LAST);

 web_reg_find( "Text=OMS4.0", "Search=body", LAST );

 web_submit_data("login.aspx",
  "Action=http://192.168.1.96/yzw/login.aspx",
  "Method=POST",
  "RecContentType=text/html",
  "Referer=http://192.168.1.96/yzw/",
  "Snapshot=t3.inf",
  "Mode=HTML",
  ITEMDATA,
  "Name=__EVENTTARGET", "Value=", ENDITEM,
  "Name=__EVENTARGUMENT", "Value=", ENDITEM,
  "Name=__VIEWSTATE", "Value={Siebel_Analytic_ViewState2}", ENDITEM,
  "Name=__EVENTVALIDATION", "Value=/wEWBQLFrPCIAwLT8dy8BQK1qbSRCwKC3IeGDAKQ9M/rBbg91du/4WubQURx9O5nGCbOaFPF", ENDITEM,
  "Name=txtUserID", "Value=admin", ENDITEM,
  "Name=txtPassword", "Value=123456", ENDITEM,
  "Name=btnLogin", "Value=登陆", ENDITEM,
  EXTRARES, 
   "Url=WebResource.axd?d=i-C5SBA4Eu8sTmMxayW0xvCV_nr1qHCjh8ULKVnZpsY1&t=634027746547968750", "Referer=http://192.168.1.96/yzw/SecFox/Default.aspx", ENDITEM,
  "Url=SecFox/images/separator_right.gif", "Referer=http://192.168.1.96/yzw/SecFox/Default.aspx", ENDITEM,
  "Url=SecFox/images/group_close.gif", "Referer=http://192.168.1.96/yzw/SecFox/Default.aspx", ENDITEM,
  LAST);

 
 web_url("WebPartIndex.aspx",
  "URL=http://192.168.1.96/yzw/Index/WebPartIndex.aspx",
  "Resource=0",
  "RecContentType=text/html",
  "Referer=http://192.168.1.96/yzw/SecFox/Default.aspx",
  "Snapshot=t4.inf",
  "Mode=HTML",
  EXTRARES,
  "Url=../WebResource.axd?d=pBFoWJfF4zBA74K3YV7h0g2&t=634027746547968750", ENDITEM,
  "Url=../App_Themes/GS/Images/Minimize.gif", ENDITEM,
  "Url=../App_Themes/GS/Images/PTCLOSE.GIF", ENDITEM,
  "Url=../App_Themes/GS/Images/board_title_bg.jpg", ENDITEM,
  LAST);

 lr_end_transaction("gg",LR_AUTO);

 return 0;
}