Upload to .NET web service iOS

I need to pass some data in order for the server to the save the info,in order to do this the parameters need to pass the parameters in XML nodes following a url http://ift.tt/1E8AZa9

Here is an example of the XML node structure

<Send_info>
<Service_order> 
</Service_order> 
<Data_stream> 
<info> 
</info> 
</Data_stream> 
</Send_info>.

The return value would be a JSON string with {"Uploaded":"TRUE"} or {"Uploaded":"FALSE"} respectively.

I have tried this method with no answer it just return nil.

-(void)Request:(NSData*)data{
NSURL *aUrl = [NSURL     URLWithString:@"http://ift.tt/1E8AZa9"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:aUrl
                                                       cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                   timeoutInterval:60.0];
[request setHTTPMethod:@"GET"];

[request setHTTPBody:data];

NSURLConnection *connection= [[NSURLConnection alloc] initWithRequest:request                                                           delegate:self];
[connection start];
}