Setting up Sublime SFTP with EC2 Ubuntu 13

Setting up Sublime SFTP with EC2 Ubuntu 13

I'm on Windows 7, and I have my EC2 instance up and running. I have my key
file, with permission 400. I can SSH into my EC2 and I can even sftp into
it from command line (Cygwin) like so:
sftp -i ~/.ssh/ekia_ec2.pem ubuntu@54.***.***.149
But Sublime's SFTP instantly throws a "Connection timeout" at me. I've
tried both path types:
/C/cygwin/home/Ehsan/.ssh/ekia_ec2.pem
C:\\cygwin\\home\\Ehsan\\.ssh\\ekia_ec2.pem
I've also tried using "ssh_flags" instead of "ssh_key_file"
"sftp_flags": ["-i /C/cygwin/home/Ehsan/.ssh/ekia_ec2.pem"]
"sftp_flags": ["-o IdentityFile=/C/cygwin/home/Ehsan/.ssh/ekia_ec2.pem"]
Nothing works. Sublime 2, Windows 7 64bit, SFTP 1.11.2.