Why did I get result code -9?

PayPal returned result code -9 - SSL read failure.

The Payflow Pro client didn't receive the expected number of bytes returned from your server. This is usually due to Internet congestion.

Retry the transaction. If the problem persists, check with your hosting company or Internet Service Provider for possible network or connectivity issues.

For help resolving this issue or others, visit PayPal's Contact Customer Service page.