Google speech API is not giving result on iPad and iPod touch

gistfile1.txt

Hi,
 I have used the google sppech api v2 version in my project and it is working fine on iPhone.
 But while testing on iPod Touch and iPad, i am getting null response from google api.
  What can be the reason.
       Please help me out.
       
       I have used this line of code
       
        NSURL *url = [NSURL URLWithString:@"https://www.google.com/speech-api/v2/recognize?output=json&lang=en-IN&key=AIzaSyBOti4mM-6x9WDnZIjIeyEU21OpBXqWBgw"]; 
    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
    [request setHTTPMethod:@"POST"];
    [request setHTTPBody:byteData];
    [request addValue:@"audio/x-speex-with-header-byte; rate=16000" forHTTPHeaderField:@"Content-Type"];

If somebody have faced the same issue and have any solution then share with me.