How to type in Telugu language in Indesign CS6

I want to make use CS6 for DTP work in one Indian Language,namely Telugu. In     the dropdown list , I select ,say Bapuscript,which is a Telugu language font. When I start typing , using  Phonetic notation , I get only Pink color rectangular boxes,and not Telugu language  characters as expected. What should I do to get Telugu characters in  the Document. Somebody may please throw some light. Thanks