I'm receiving payments using Blockchain API.

The receiving payment part works but after that, when it's supposed to call a link on my website to inform about the payment, it's not working. I'm using blockchain's callback tester found on their API page at https://blockchain.info/api/api_receive

My website should return Ignoring test callback but it returns Read timed out. Also it returns the same on every link from my website I put in.

P.S: I'm using an SSL certificate and in my .htaccess I'm forcing the website to request to go to https:// from http://.