Data access delay from server

Question

I'm developing an application in which I access data from the server through php. I use NSURLConnection for that. The data is fetched successfully, but there is some delay.

I'll describe in detail.

I want this:

When the user clicks the button, then send a request automatically to the server and receive the response from the server and display the response in an alert view.

The problem is:

I check the response in an if condition:

If(flag==1)

NSLog(@"%@",YES);

else

NSLog(@"%@",NO);

But problem is that when the user clicks for the first time, then it prints NO. When clicked again, then it prints YES.

How can I solve this?