We need some more info on this. PayPal seems to work fine here. Can you describe the exact problem please.
...Because there was a Paypal trick. Site goes very, very fast, faster then blink of the eye from paypal "continue" site to your site, but when I klick "back" in my browser, then I appear on paypal site that says that card couldn't be processed. That's why it looked like there is gateway problem (because browser quickly skipped throu page with message that card couldn't be processed). Actually there is a problem. Not with link between űber and paypal gateway but with debit card processing via paypal. Paypal often sucks with debit cards.