I have created Map application for iPhone and I developed same Map application on iPad too by my client requirement. Now I have same Map app project but two .ipa files one f
You can't upload two binary versions of the same app under the same name.
You either have to make a universal app (meaning iPhone/iPad app in one app) or submit under another name.
Start reading this: http://developer.apple.com/library/ios/#documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/AdvancedAppTricks/AdvancedAppTricks.html