Invalid Binary Architecture help

Invalid Binary Architecture - iOS 3.0 introduces support for multiple binary architectures. If your binary is built for multiple architectures, your Info.plist must have a MinimumOSVersion key with a value of at least 3.0. Additionally, in order to support existing devices, all iOS 3.0 binaries submitted for distribution through iTunes must contain at least an armv6 binary; “thin” armv7-only binaries will not be accepted unless the armv7 required device capability is also present in the Info.plist UIRequiredDeviceCapabilities key.

How do I fix this?

Ive got MinimumOSVersion in my playlist. Deployment target set as 3.0 and base sdk 4.1 and architecture (standard armv6 armv 7)

Thanks for your help.

Did you switch the “Active architecture” to armv6 in the dropdown box on the top left of your project? (“Device - 4.1 | Distribution”-dropdown)