PPTP error 619 usually means one of two things...
  1. Firewall/router issue: PPTP needs TCP port 1723 and IP Protocol 47(GRE) allowed/forwarded to work. Some routers has a feature called VPN Passthrough that needs to be enabled.
  2. Username/password issue: Sometimes when you copy and paste the username/password you can add whitespaces to the end of the text. To avoid this copy and paste to a text editor first or enter the details manually.