Pay per View payments not going through

Hello

I have an issue with the Pay per View plugin, payments are not coming through. when the PPV button is clicked, i am directed to paypal, i put the payment info, then i am redirected to my site with the error “There was a problem connecting to PayPal to setup your purchase. Please try again.”.

– I checked with PAypal, my account is ok so is API

– My developer tested it on his server and it worked out fine

– I am using Hostgator

Can you please give me some guidance as this is preventing me from launching the site?

thank you