sending data to a webserver with NSMutableURLRequest

I am creating an iOS app that needs to send a post to a php script. the php script then takes these values and updates an xml file. I can't for the life of me figure out why this wouldn't work... Also how could I test to see whether or not the php script is actually receiving data? Here is my objective-c code:

NSDate *now = [NSDate date];

NSString *rowString = [NSString stringWithFormat:@"%d", index.row];



// format the date

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

[formatter setDateFormat:@"HH:mm"];

NSString *time = [formatter stringFromDate:now];



NSString *post = [NSString stringWithFormat:@"newTime=%@&newValue=%@&locationIndex=%@", time, coverAsString, rowString];



NSLog(@"the post data is %@ with row string: %@", post, rowString);

NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];

NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];



NSURL *url = [NSURL URLWithString:@"http://myscript.php"];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

[request setHTTPMethod:@"POST"];

[request setValue:postLength forHTTPHeaderField:@"Content-Length"];

[request setHTTPBody:postData];

As you can see I check to make sure the post string is correct. I am trying to do this without using AFNetworking... I find that to be a little too much for what I'm trying to do.

Any help is appreciated! Thanks!