tried pptp on 4.3 and it does not work. Upgraded to 4.3.1 and now l2tp doesn't work! Tried pptp on 3.2.2 iPad 1, and it works. Upgraded to 4.3 and it breaks VPN.
Make sure you set the encryption level to "maximum", not auto. Also, post details of your iOS version. The OPs thread was from some time ago and things have moved on...
