iphone - Xcode 3.2.3 error regarding deployment target

I have an application that is supporting iOS 2.0.

The Base SDK is set to iPhone Device 4 and the iPhone OS Deployment Target is set to iPhone OS 2.0

My intention is t开发者_开发问答o build it compatible with iPhone 3/3GS and 4 and iPod touch 2nd generation

This settings I have compile file, but when I upload it to iTunes Connect I see this error

The binary you uploaded was invalid. Applications built for more than one architecture require a iPhone OS Deployment Target of 3.0 or later.

How do I solve that? thanks

==== just a note: my Xcode 3.2.3 allows me compiling for 2.x because I copied the necessary files from older Xcodes to this newest one

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Change the Deployment Target to 3.0, Apple doesn't support iOS 2 anymore.

If you want the app to be compatible with the 2nd gen iPod touch, that isn't a problem, as this device is perfectly capable of running iOS 3 and 4.