WinCC Web Navigator在客户端浏览时,无法切换

 #include "apdefap.h"
 void OnClick(char* lpszPictureName, char* lpszObjectName, char* lpszPropertyName)
 {
   int i;
    char *buffer[11]={"Btn1","Btn2","Btn3","Btn4","Btn5","Btn6","Btn7","Btn8","Btn9","Btn10","Btn11"};
 // zzzFCEZone_FCE-SRV::YCJK-SlabIdtf.pdl为服务器上画面
   SetPropChar("Start.pdl","PicWin","PictureName","zzzFCEZone_FCE-SRV:: xxxx-SlabIdtf.pdl"); 
   for (i=1;i<=11;i++)
   {
     if (i == 1)
     {
       SetPropWord(lpszPictureName,lpszObjectName,"BackColor",65535);  
       SetPropWord(lpszPictureName,lpszObjectName,"BorderColorTop",8421504);  
       SetPropWord(lpszPictureName,lpszObjectName,"BorderColorBottom",16777215); 
     }
     else
     {
       SetPropWord(lpszPictureName,buffer[i-1],"BackColor",13160661);  
       SetPropWord(lpszPictureName,buffer[i-1],"BorderColorTop",16777215);  
       SetPropWord(lpszPictureName,buffer[i-1],"BorderColorBottom",8421504); 
     }      
   }

 #define RUN_ON_WEBNAVIGATOR
 #ifdef RUN_ON_WEBNAVIGATOR
 //int i;  //char*buffer[11]={"Btn1","Btn2","Btn3","Btn4","Btn5","Btn6","Btn7","Btn8","Btn9","Btn10","Btn11"}
 // xxxx-SlabIdtf.pdl为本地画面
  SetPropChar("Start.pdl","PicWin","PictureName","xxxx-SlabIdtf.pdl"); 
 #endif
 以上代码WINCC上通过.为什么在WEB Navigator只显示主界面,无法通过该按钮切换呢.?? 在线等............