I'm making an Indic font and some letter combinations have to be replaced by a single glyph and so on. I've never designed a font requiring substitutions. I studied Kalinga font supplied with MS Windows and applied what I learned but the conjuncts aren't working: even though FontForge shows that they would. Been at it for 2 days, even tried MS Volt but couldn't figure out anything. Any help will be appreciated. Click image for larger version. 

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