I just installed 12.04 (fresh install) and realized I could no longer tether with my iPhone like how I did on 11.10 without any hassle. On 11.10 (to my amazement) all I had to do was turn on USB tethering option in MyWi and my system would automatically connect to the Internet via my phone. What has changed and how can I tether again?

BTW it is an iPhone 3G (jailbroken)