LoadVars problem - works only once

programming flash
1

I’m trying to create a basic interaction between flash and ASP.net v1.1.

In flash code I’m using the LoadVars function and on asp.net page I’m using “Response.write” to return the value to flash.
I have a flash button which send the load to the asp.net.

MY CODE WORKS , BUT ONLY ONE TIME!
(meaning the first time I click the button , the asp.net page is called and return the value , but the second time nothing happens!)

Here is my code:

FLASH:

 function doCheck()
{    
    checkSessID = new LoadVars();    
    checkSessID.onLoad = function (serverIsOnline)      
   { 
 
      if (this.success == "true") 
     { 
     } // end if  
   }; 
 
checkSessID.load("http://" + "localhost/FlashTest" + "/IM/IMService.aspx?command=validateuser&sessID=" + "1" + "&username=" + myName);
 
}

ASP.net:

 private void SendResponse()
{    
 
string result = "true";    
Response.Clear();    
Response.Write(String.Format("&success={0}&", result) );    
Response.Flush();    
return;
 
}

The first time in click on the flash button the doCheck() function is called and the sendResponse function (which is in the “IMService.aspx”) return the value to flash.
Then , when clicking the second time on the button , nothing happens

Any idea why this works only once?

THANKS!