SSH Permission denied (publickey) on AWS EC2

I'm trying to ssh into my Linux AWS Ec2 instance and I'm getting this error:

Permission denied (publickey)

My command was like this (it was working before):

ssh -i /Users/gustavorpaiva/Documents/Trabalho/VITRINE/admin-catraca.pem  ec2-user@ec2-54-207-55-211.sa-east-1.compute.amazonaws.com

Yesterday I've changed some lines in /etc/ssh/sshd_config to temporary allow root login with password, this lines:

…
PermitRootLogin yes
# Only allow root to run commands over ssh, no shell
#PermitRootLogin forced-commands-only
…
# To disable tunneled clear text passwords, change to no here!
PasswordAuthentication yes
#PermitEmptyPasswords no
# EC2 uses keys for remote access
#PasswordAuthentication no
…

After reverting it I ran:

sudo service sshd reload

And thought it would be the same as before. But no. This is the full response when I ssh -v:

OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
debug1: Reading configuration data /etc/ssh_config
debug1: /etc/ssh_config line 20: Applying options for *
debug1: Connecting to ec2-54-207-55-211.sa-east-1.compute.amazonaws.com [54.207.55.211] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /Users/gustavorpaiva/Documents/Trabalho/VITRINE/admin-catraca.pem type -1
debug1: identity file /Users/gustavorpaiva/Documents/Trabalho/VITRINE/admin-catraca.pem-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.2
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.2
debug1: match: OpenSSH_6.2 pat OpenSSH*
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5-etm@openssh.com none
debug1: kex: client->server aes128-ctr hmac-md5-etm@openssh.com none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: RSA 93:d3:86:54:d9:55:ec:c2:e5:f2:af:a4:8a:ef:9c:f6
debug1: Host 'ec2-54-207-55-211.sa-east-1.compute.amazonaws.com' is known and matches the RSA host key.
debug1: Found key in /var/root/.ssh/known_hosts:5
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /Users/gustavorpaiva/Documents/Trabalho/VITRINE/admin-catraca.pem
debug1: read PEM private key done: type RSA
debug1: Authentications that can continue: publickey
debug1: No more authentication methods to try.
Permission denied (publickey).

I'm getting a little freaked out here. Did I messed up?