[TYPO3-mvc] TYPO3 v7.6 extBase backend module template path not working

[Ghanshyam B. Gohel]

I have created extBase extension using extension_builder. Everything is fine but backend module path not working.

- constants.txt

module.my_ext {
view {
         templateRootPath = EXT:my_ext/Resources/Private/Backend/Templates/
         partialRootPath = EXT:my_ext/Resources/Private/Backend/Partials/
         layoutRootPath = EXT:my_ext/Resources/Private/Backend/Layouts/
     }
}

-setup.txt

module.my_ext {
    	view {
    		 templateRootPath = {$module.my_ext.view.templateRootPath}
    		 partialRootPath = {$module.my_ext.view.partialRootPath}
    		 layoutRootPath = {$module.my_ext.view.layoutRootPath}
     	}
 }

I have clear:
- Install tool cache
- General cache
- Even removed entire typo3temp folder

I have included static template in my root template.

But, it still consider FE template view
Please assist me, where I did mistake or it is core issue?

Thank you.
Ghanshyam
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