SCIM Input Method not working

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http://askubuntu.com – I'm trying to type in my native language Sinhala with SCIM..but nothing is working. (I heard about something called ibus could help.) I want to get the phonetic output in Sinhala Unicode, when I input some phrase in in English. Is there a way to fix this...? Appreciate any help, Thanks! My SCIM settings : (HowTos)