Login to Linux server automatically using SSH key with TeraTerm

I downloaded id_rsa to my laptop and saved it as tester.pem and used it to login to linux server successfully using Tera Term. Now i want to make it automatically which means i can just use 1 click to .ttl file and voila, login successful. Here's the script of tester.ttl but it didn't work.

username = 'tester'

keyfile = '"C:\path\to\keyfile\tester.pem"' 

hostname = 'server's ip'



pass = '789789'

msg = hostname

strconcat msg ':22 /ssh2 /auth=publickey /user='

strconcat msg username

strconcat msg ' /keyfile='

strconcat msg keyfile



connect msg