Hello Mr. Mosquito; the best advise that I can give you at this time is to follow this steps then retry to establish your connection,
-- factory default your router
--Down and uplaod the latest firmware into you router
--Manually reconfigure your router-----( DO NOT UPLOAD THE OLD CONFIGURATION)
-- Do a port forwarding with the server's LAN ip address under the port forwading tab in your router
Note:don't forget to create your account in your server before establishing any PPTP connection. If this does not work please contact us at 1866-606-1866 US/Canada.