Email Template not Working

Hello all
I’ve created a custom email template and written the client script for sending mail and mentioned the custom email template in that client script, Mail is sending but it shows No message in the mail, so I think there is a problem with the linking of the email template.
Here is my code and template screen shot and email screenshot, Please Help me to get Out of this so I can move forward with the content of the mail



Is there any update on this topic? I am facing same issue.