My iPad keeps spitting out the error: "A connection could not be established to the PPP server."

I am trying to connect it to a VPN I set up with Windows 7 as an incoming connection.

On the iPad, I went into the VPN settings, added a new PPTP VPN with the following information

• Server: Windows 7 Computer's IP RSA SecurID: OFF
• Account: Account Username
• Password: Account Password
• Encryption Level: Auto
• Send All Traffic: ON
• Proxy: Off

Now I know that it is making some connection to the Windows 7 Computer because whenever I intentionally put in the wrong VPN password on the iPad, it makes me put in the correct one before trying to connect again.

All the ports are forwarded on my router for PPTP, and my Windows 7 Firewall is even off to try to get this to work. Any help would be greatly appreciated, thanks.