The VPN I have is a PPTP one. It runs perfectly on my PC with its Windows 7. Now I have entered all the info correctly into the iPad and when I try to connect, it says "Starting..." and then after 10 seconds an error message pops up, saying "You were disconnected by the communication device. Try reconnecting. If the problem continues, verify your settings". What should I do now? Please help. Thank you in advance.