Hello fellows,
It's been a long time and I come with good — although ashaming — news.
I just managed to get the router working with my MacBook Pro by adding the wireless card MAC Address to the whitelist. I had only the wired card MAC Address in the list.
Anyways, I'm inclined not to consider this as a complete failure of my part (lol) because when I tried to connect without filtering or any security options, it didn't work.
Thanks for all your attention and support. I'm a happy wireless user now.