title: ASIHttpRequest not passing data
body: <pre><code> NSURL *url = [NSURL URLWithString:@"http://test.com/misc/app/ws/ws_user_registration.php?"];
       ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
  
       [request setRequestMethod:@"POST"];
       [request setDelegate:self];
  
    [request appendPostData:[[NSString stringWithFormat:@"{\"user_name\":\"%@\",\"user_tag_status\":\"%@\",\"description\":\"%@\",\"mobile_number\":\"%@\",\"device_type\":\"%@\",\"device_id\":\"%@\",\"device_token\":\"%@\",\"os\":\"%@\",\"os_version\":\"%@\",\"image_data\":\"%@\",\"user_id\":\"%@\"}",self.phnNumTxtFld.text,@"live",@"description",self.phnNumTxtFld.text,@"iPhone",appDelegate.deviceID,appDelegate.deviceToken,@"iOS",[UIDevice currentDevice].systemVersion,[data base64EncodedString],@""] dataUsingEncoding:NSUTF8StringEncoding]];
       [request setDidFinishSelector:@selector(getTreeRequestFinished:)];
       [request setDidFailSelector:@selector(getTreeRequestFailed:)];
       [request startAsynchronous];
  </code></pre>
  
  <p>appendPostData: passing NSData but server not getting this data. </p>