Does Admob work with iPhone OS 3.0? -

I want to use AdMob to display ads in one of my apps I have registered for AdMob, but When I try to use it with the iPhone 3.0 SDK, I am seeing errors. Is it possible to use AdMob with this version of the SDK?

AdMob iPhone ads are optimized especially with OS 2.0 and above For iPhone and iTouchdevices