I get 503 ERROR 'Down for Maintenance'. But sometimes the page shows up. by mstindia

Hi all,

I have built my first shopify app. I am using App proxy to show data.

I get 503 ERROR 'Down for Maintenance'. But sometimes the page shows up.

Here is the url. If you open it will show
http://iresponsify.myshopify.com/apps/iwish

What must be wrong. any ideas? My App is built using PHP.

thanks for your time!