AWS Copy S3 to RDS

I am trying to copy from S3(.csv file) to RDS(MySQL) using Amazon Data pipeline and My error:

Error copying record
Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
Cause: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
Cause: connect timed out

NOTE: I tried RDS TO S3 with the same connection string and it worked! but S3 to RDS does not work not sure why.