/System/Library/Extensions/USBAtTable.kext installation error (Xcode)

While installing Xcode 3.2 and iPhone SDK 3.1 for Mac OS X 10.6 Snow Leopard, the following error message is shown "/System/Library/Extensions/USBAtTable.kext installation error". Could anyone help.
Regards,
MKS

Try the developer forums under OS X Technologies. Alternatively, download and install Xcode Tools 3.2.1, followed by the latest iPhone SDK.

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