Publishing SharePoint 2013 App in MS Store - SupportedLocale is not a valid element error

Hi,

I have developed a basic SharePoint hosted App. For development I used Office 365 and VS 2012.

App is working fine, but when I define 'Supported Locale' element in AppManifest  -

<SupportedLocales><SupportedLocale CultureName="en-US" /></SupportedLocales>

I'm getting compile time error: 'The element 'Properties' has some invalid element...' and ultimately its not allowing me to use 'SupportLoacales'

Without support locale element I can not publish my app to MS store. Has anyone else also encounter this problem?

Pls see the error msg below -

-Bhanu Singh