Blossoms Chili Plant Dropping Off?

I have a chili plant grown in a pot. Now it is about 3 months old. Flowering has started, but the majority of the flowers after blooming fall off on the 3rd or 4th day. My country is in the tropics. The average temperature is about 32 degrees Centigrade.

The plant looks very healthy. I do water the plant every day only a very few chilies are developing. What can be the cause and what can I do about this problem?

By tuanb ibrahim from Sri-Lanka