malayalam typing error only the letter nda

nda only the problem adobe products i mean illustrator,indesign,photoshop,have this same problem but adobe page maker nda is coming properly please solve this problem becouse now i am using corel draw old virsion 12 that is working but coreldraw have some limitations but adobe producrts have anyother problems except nda letter probm so please solve this problem as soon as posible.