solving the heroku windows permission denied (publickey) problem

i spent quite some time solving this heroku permission denied (publickey) error on my windows machine.

i have read this post (which i think still helpful)

http://www.gmarwaha.com/blog/2011/05/18/heroku-trouble-with-windows-and-ssh-keys/

but couldn't solve it. i have also tried to create key under different name and use heroku keys:add to add in those custom named .pub file

eventually somehow my solution is to amend my ssh key generation by overwriting the id_rsa file
so it means i simply have to accept the default key name