ADE dont support Tamil fonts- Help needed

I have some epub books in tamil fonts, i can read this in Google play books but not in the ADE. (I dont have any DRM on the files.)

i can read my font in title & index on the library, but contents are with marks of X on rectangle. i could read this with some other e readers as well. could some one help me on this?

i have attached the snap below.

-spr2330033